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Linda Velazquez


Greenroofs.com: Linda S. Velazquez, ASLA, GRP, LEED AP

Alpharetta, GA, USA.  Linda S. Velazquez is founder and publisher of Greenroofs.com (1999), the international greenroof industry’s resource portal.  Greenroofs.com is the founder and organizer of the Greenroofs & Walls of the World™ Virtual Summit 2015, its third biennial online conference (2011, 2013).  Linda writes and reports extensively about greenroofs and holds a Bachelor’s of Landscape Architecture from the University of Georgia (2000) with honors.  She is also principal of Sky Gardens Design (2004), a greenroof design and consulting firm.  Linda is a member of the American Society of Landscape Architects (ASLA), a LEED Accredited Professional (LEED AP) with the U.S. Green Building Council, and a Green Roof Professional (GRP) with Green Roofs for Healthy Cities (GRHC).

Greenroofs.com is an internet news media organization whose goal is to inform, promote and inspire the earth friendly technology of organic greenroof architecture through the free interchange of ideas, projects, news, video, research, organization/government updates, and marketing opportunities.  Exclusives include guest articles, contributing editor columns, the Sky Gardens Blog and the WebTV series Sky Gardens ~ Greenroofs of the World™.

Greenroofs.com publishes The Greenroof & Greenwall Projects Database currently with over 1,600 projects; The Greenroof & Greenwall Directory of Manufacturers, Suppliers, Professional Services & Organizations; and the GreenroofsTV channel on YouTube, a video channel devoted to greenroofs and greenwalls.

Linda presided as host, and opened and closed the Greenroofs & Walls of the World™ Virtual Summit 2015: Connecting the Planet + Living Architecture.


She also co-presented "The Greenroofs.com 2014 Top 10 List of Hot Trends in Greenroof & Greenwall Design + a Look into 2015" with Haven Kiers.





Diana Balmori, PhD, FASLA, IFLA

New York, NY, USA.  Diana Balmori founded Balmori Associates in 1990.  The landscape and urban design practice is recognized internationally for designing sustainable infrastructures that serves as an interface between landscape and architecture.  In 2006, she created BAL/LABs within Balmori Associates, to further push the boundaries of architecture, art and engineering: Green Roofs, Floating Islands, Temporary Landscapes, Forms of Representation, and Zero Waste City, among others.

Diana keeps an active voice in national policy and decision-making on topics that relate to landscape design, architecture and urban planning.  She has served as: member of The United States Commission of Fine Arts in Washington, DC; a Senior Fellow of Dumbarton Oaks, Washington, DC; a member of the Allston Development Group at Harvard University, Boston, MA; on the Board of The Van Alen Institute, New York City; The Lower Manhattan Development Corporation for the World Trade Center Site, New York City; and as a Committee Member for the Comprehensive Design Plan for the White House.

Diana’s opinion-editorials and articles about her work have been featured in Dwell, The Architects Newspaper, Monocle, El Pais, PBS, WNYC, Design Observer, and Utne Reader, which named her one of fifty “Visionaries Who Are Changing Your World” in 2009.  She was named Fast Company’s Third Most Creative People in Business (June 2013) and one of ten Innovators by Architectural Digest (September 2013).

Her book A Landscape Manifesto (Yale University Press, 2010) has received international attention and was recently translated into Chinese.  Her most recent book is Drawing and Reinventing Landscape (A/D Wiley, 2014).  Since 1993 she has been a Critic at Yale University in both the School of Architecture and the School of Forestry and Environmental Studies.


Diana presented "Green Roofs to New Cities."  Video production by Stacked Up TV Productions.  Visuals by Joseph Maida, Mark Dye, Efrain Mendez / archframe.net, Bilbao Ria 2000, University of Iowa and Balmori Associates with the design teams of each project.



Stephan Brenneisen, PhD

Basel, Switzerland.  Dr. Stephan Brenneisen is a green roof and biodiversity expert and head of the Green Roof Competence Center at Zurich University of Applied Sciences (ZHAW) in Wädenswil where he conducts research and advises on green roof policies and designs.


A member of the collective UG LAB, he is a true leader and pioneer in the green roof field for over 15 years, Stephan has opened many doors in the green roof world and challenged how we think of green roof biodiversity. Continuously without fail, he has demonstrated his ingenuity and critical thinking about ecosystems, urban greening, substrates and how we interact in our world.  A well known international speaker and a true educator he is dedicated to sharing his knowledge through teaching, writing and cutting edge research.  He also has created a successful model for policy and green roof implementation in Basel and Zurich and is constantly creating new green solutions for improving our urban habitats.


Stephan did his PhD Geograph studies on how different green roof substrate depths influence biodiversity and continues to actively promote the design of green roofs for biodiversity.


Stephan presented "Biodiversity in the Sky – How Green Roofs Can Be Designed as Wild Life Refuges."



Ken Yeang, PhD

London, UK and Kuala Lumpur, Malaysia.  Ken Yeang is an architect, ecologist and planner, known for his authentic ecology-based work on the theory and signature ecoachitecture and ecomasterplanning that have a distinctive hirsute verdant green aesthetic, carrying out design and research in this field since 1971.  He graduated from the AA School (London) and received his doctorate in ecological design and planning from Cambridge University (UK).


He is principal of Ken Yeang Design International and Hamzah & Yeang, with offices in Malaysia, UK, and China.  The firm’s expertise is in signature, innovative green architecture and masterplans that go beyond conventional accreditation systems.  He did his post-graduate at Cambridge University Department of Architecture.  His doctoral dissertation, "A Theoretical Framework for Incorporating Ecological Considerations in the Design and Planning of the Built Environment" earned him a PhD in ecological design and planning.  It is published as Designing With Nature (McGraw-Hill, 1995) and in Spanish as "Proyectar Con La Naturaleza" (Gustavo Gili, SA, 1999).  He received an honorary Litt.D. from Sheffield University (2004), and an honorary PhD from University of Malaya (2013).


Yeang took ecology courses at the Department of Environmental Biology at Cambridge University and attended (partially) the ecological land use planning course at University of Pennsylvania, Department of Landscape Architecture under Ian McHarg.  He became a member of the British Ecological Society.  These studies provided the bases for Yeang’s doctorate and to later develop his biodiversity approach to ecological architecture and masterplanning.


Ken has completed over 12 bioclimatic eco high-rise buildings, several thousand dwellings (terraced houses), over two million sq. ft. of interior design space, numerous eco-masterplans and eco-city designs, and has overall completed over a hundred building projects of all types worldwide.  Yeang lectures extensively in over 30 countries at conferences and schools of architecture on his ideas and work on ecological design and masterplanning.


Ken Yeang is recipient of the Malaysian Institute of Architects Gold Medal and the Malaysian Government’s Merdeka Award.  The British newspaper The Guardian refers to him as 'one of the 50 people who could save the planet.'


Linda Velazquez interviewed Ken Yeang for his Keynote: "A Green Building Should Look Green, Which Means Hairy!" filmed in London in February 2015.







Pablo Atuesta

Bogota, Colombia.  Over the past five years Pablo Atuesta Pradilla has dedicated himself to the promotion and building of revolutionary green roofs and green wall projects through his company, Groncol in Colombia, South America.  As General Manager and a business administrator with a strong focus towards entrepreneurship and innovative projects, he has merged all of his passions in creating a startup that has a highly innovative product that can produce a positive impact within the environment and society.  The company has been recognized by Endeavor, one of the most important entrepreneur organizations in the world, as a local high impact and high potential company due to the potential in job creation and the generation of environmental and social benefits.

As a company, Groncol has built over 180 projects and more than 150,000 square meters of vegetated infrastructure.  Among the most important projects is a 92-meter high green wall and they are in the process of building one of the largest green walls in the world (over 3,200 square meters).  Groncol – “GRØN” means green in Danish and “Col” stands for Colombia – represents the dream partners Pablo Atuesta, Juan Rebolledo, Mario España and Nicolás Borda have for a green Colombia and a green world.  Groncol is the leader in the design, construction and installation of green rooftops and walls in the Colombian market and one of the largest players in Latin America (even though it only operates in Colombia).  Groncol is a leader by example.  By managing to build all of these projects it has inspired construction companies, government, and top companies in Colombia to get involved in vegetated infrastructure.  All of the vertical gardens have been built by Groncol with the Spanish firm Paisajismo Urbano's technology.  They have focused on developing the local market by being an example for the industry as well as building the foundations for the future growth of vegetated infrastructure.  They have created new suppliers like Metroverde and actively supported the growth of the vegetated infrastructure guild Recive.


Pablo presented "The Development of Revolutionary Large Scale Vegetated Infrastructure Projects in Latin America and the Foundation of a New Industry."


Twitter: @groncol and @pabloatuesta; Linked in: https://www.linkedin.com/in/pabloatuesta


Durante los últimos cinco años, Pablo ha dedicado su vida la promoción y construcción de revolucionarios proyectos de techos y muros verdes a través de su compañía, Groncol en Colombia, Suramérica. Cómo administrador de empresas, con un fuerte enfoque hacia la innovación y el emprendimiento, en Groncol ha logrado unir todas sus pasiones: crear una compañía con un producto altamente innovador que puede producir un impacto positivo en el medio ambiente y la sociedad. Groncol ha sido reconocida por Endeavor, una de las redes de emprendimiento mas importantes del mundo www.endeavor.org, cómo una empresa que tiene el potencial de crear un alto impacto en creación de empleo y beneficios ambientales y sociales.

Cómo compañía, Groncol ha construido más de 180 proyectos y más de 150,000 Metros cuadrados de Infraestructura Vegetada. Entre los proyectos mas importantes, Groncol ha construido un muro verde de más de 92 metros de alto y están en el proceso de construir uno de los muros verdes más grandes del mundo (3,200 M2). Groncol - “GRØN” quiere decir verde en Danés y “Col” colombia. Esto representa el sueño de Pablo Atuesta, Juan Rebolledo, Mario España y Nicolás Borda de tener una Colombia y al final un mundo verde. Groncol es el líder en diseño, construcción e instalación de techos y muros verdes en Colombia y uno de los jugadores más importantes de América Latina, aunque actualmente solo opera en Colombia.

Groncol es un líder a través del ejemplo. Al lograr construir proyectos impactantes, ha inspirado empresas de construcción, gobierno y las principales compañía en Colombia a construir cada vez más proyectos de infraestructura vegetado. Todos los proyectos de Jardines Verticales han sido construidos por Groncol con la tecnología de la firma española
Paisajismo Urbano. Groncol se ha concentrado en desarrollar el mercado local dando ejemplo en la industria y creando las bases para el crecimiento futuro de la industria de la infraestructura verde. Entre otras cosas hemos creado proveedores de vegetación y sustrato como Metroverde y hemos colaborado activamente en la creación y el desarrollo del Gremio de Infraestructura Verde Recive.



Robert “Bob” D. Cameron, PhD

University Park, PA, USA.  Bob spent more than two decades directing the global environmental programs of a Fortune 30 multi-national conglomerate.  In the late ‘70s in collaboration with NASA, he designed, permitted, and constructed the first constructed wetlands to treat wastewater from the natural gas industry.  Working on every continent except Antarctica, Bob designed award winning environmental programs based on sustainability concepts.  Later as President of his own corporation, he de-engineered historic buildings destined for the wrecking ball, which he then relocated and reconstructed with green architectural features.

Pursuing a life-long goal, he recently earned his doctorate from Penn State University at the Center for Green Roof Research.  His thesis entailed the invention and construction of a functional architectural system to attenuate wastewater pollutants while reducing a building’s energy use and providing a platform for urban agriculture.  Currently, Bob has an appointment with the Department of Landscape Architecture at Penn State University and teaches collegiate courses and conducts research on greenroofs, livings walls, constructed wetlands, aquaponics, and artificial islands while also managing Eco Applied Technologies, a consulting firm for commercial, residential, and industrial applications.  He has lectured on sustainable technologies around the world and in 2013 he literally circumnavigated the globe while working on environmental issues in numerous countries, including teaching environmental engineering for several months at a Chinese university which culminated in the design and construction of a living wall with the students.  See the 2:45 video of his early work at Penn State "Robert Cameron investigates biofilters to clean dirty water."


Bob presented "Versatile Living Walls & Roofs: International Applications for Agriculture, Energy Conservation, Pollution Attenuation, and Aesthetics."  He also participated in the "From Passive House to the Cold North—How Vegetative Envelope Components Impact Buildings" Panel.



Graham Cleary, GRP

Auckland, New Zealand.  As Chief Rake (director), Graham founded Natural Habitats in 1978 in Auckland as a fledgling design build company under the mentorship of the city’s then only landscape architect.

Graham has worked on and led many outstanding landscape projects in the South Pacific, including resorts, golf courses, commercial projects and exquisite private estates and homes. Under his leadership, Natural Habitats has grown to be the leading provider of integrated landscape management within Australasia.  Graham demonstrates coherent leadership of multi-disciplinary teams in order to achieve the innovative, high quality outcomes for which Natural Habitats is renowned.

Graham is also at the forefront of thinking on the use of natural systems to mitigate urban development issues.  He plays an essential role in Natural Habitats' pioneering green roofs and wall technology within New Zealand.

Graham has served as consultant and advisor to numerous landscape design and environmental groups.  He is a founding member of Landscaping New Zealand, an accredited Green Roof Professional, an executive of Green Roofs Australasia, an associate of KEA, part of the Great Barrier Trust, and a member of Forest & Bird and of the Native Forest Restoration Trust.


Graham presented "Greenwalls in Middle Earth."



Angie Durhman, GRP

Minneapolis, MN, USA.   Angie Durhman runs an exclusive green roof consulting firm based in Minneapolis, AD Greenroof.  They focus on design assistance, contractor oversight, and promoting GREENFORMATION(R), a customized maintenance program for existing green roofs.  In the course of her 13 years in the industry, Angie has been involved in over 400 projects of all sizes across the country.  She received the GRP designation in 2009 and is often sought to present on sustainability topics to a variety of audiences.


Angie presented "Pollinators on the Parapets."



Elizabeth Hart, CDT, GRP

Portland, OR, USA.  As the Manager of Tremco’s North American Green Roof Program, Elizabeth Hart promotes environmental and economic sustainability through green roofs and living walls.  She works closely with architects, contractors, and building owners on the design, installation, and maintenance of over 100 green roofs.


Elizabeth received a B.S. in Sustainable Development and Botany from Appalachian State University, focusing on phytoremediation of polluted sites.  Her years of working in a medical clinic led to her inspiration for changing the "nature" of healthcare facilities.


Liz is a founding and active member of the Green Roof info Think-tank (GRiT), a network of over 400 businesses, government agencies, researchers, and community members committed to growing the collective knowledge base for on-structure vegetation.  She loves nothing more than sharing her passion for green roofing through speaking, teaching, and ultimately making more green roofs happen.


Liz presented "A Higher Purpose - Benefits to Human Health and Education through Green Roofing."


Molly Meyer, GRP

Chicago, IL, USA.  Molly Meyer is the CEO and Founder of Omni Ecosystems, which infuses the urban experience with nature. Omni leads the living infrastructure industry by providing the highest quality green roofs and green walls to create elegantly simple solutions to complex ecological questions.


Molly invented Omni’s patented living wall panel and patent-pending green roof drainage system.  She analyzed, designed, and installed all varieties of green roofs as a Robert Bosch Fellow in Germany, and brought her expertise in Germany’s mature green roofing industry to the U.S. when she founded her firm in 2009.  Molly earned her B.S. and M.S. in Earth Systems from Stanford University, and worked as a carpenter for Edifice Construction.  Molly is also the Co-Founder and Co-Manager of The Roof Crop, LLC, based in Chicago, IL.


Molly presented "Beyond Extensive and Intensive: Defining the Comprehensive Green Roof."



Mark Paul

Sydney, Australia.  Over the past 25 years Mark Paul, founder of The Greenwall Company and a qualified horticulturist, has become a name synonymous with reclaiming the built environment, a passion he has had since childhood.  Mark’s most recent achievements range from completion of one of the tallest greenwalls in Australia, implementation of a community schools program through to tailor-made residential installations in homes nation-wide. To date, Mark Paul has reclaimed thousands of sqm of the built environment.

Mark has pioneered a number of greenwalls and greenroof innovations with his formative landscape experiences and scientific background which has allowed for much experimentation, trial and testing with planting techniques, medias and methodology (and technology). These developments have put The Greenwall Company as a leader for greenwall and greenroofs in Australia.  The Greenwall Company vision is to reclaim the built environment by clothing the facades of buildings with epiphytic and lithophytic planting to create a living, breathing architectural function to every building.


Mark presented "Greening the World Inside and Outside."



Kerry Ross, GRP

Alberta, Canada.   As one of the first Green Roof Professionals, Kerry Ross operates Green T Design, Inc. a design-build company focused on lessening impacts of buildings on the environment through the continuum of landscape and architecture - green roofs and living walls.


In her efforts to bring greater awareness of the benefits and viability of green roof technology in the region, she co-founded the Alberta Ecoroof Initiative in 2004 and spearheaded the Alberta Prairie Green Roof Symposium in 2009.  With the support of the Royal Architectural Institute of Canada and a subsequent Canada Council Award, Kerry traveled extensively to Iceland, Scandinavia and Northern Europe to study and document cold-climate green roofs and living walls.  Kerry currently leads the Vegetated Roof Replacement & Research Project on Calgary’s Municipal Hall and in addition to contributing a number of articles on green roofing is engaged in the development of guidelines for green roofs for stormwater management for the City of Calgary.


Kerry presented "Greening Rooftops in Alberta: People, Place + Projects."



Edmund C. Snodgrass

Street, MD, USA.  Edmund C. Snodgrass is president and founder of Emory Knoll Farms, Inc. and Green Roof Plants, North America’s first nursery specializing in green roof plants and horticultural consulting.  Edmund has consulted on projects throughout the US and also in England, France, New Zealand, China, Australia and Morocco.  Since its inception, Emory Knoll Farms has supplied plants for over 1000 green roof projects.


Edmund is the co-author of Green Roof Plants, A Planting and Resource Guide, (Timber Press, 2006), The Green Roof Manual: A Professional Guide to Design, Installation, and Maintenance (Timber Press 2010), Small Green Roofs: Low-Tech Options for Greener Living (Timber Press 2011), and The New American Landscape: Leading Voices on the Future of Sustainable Gardening (Timber Press 2011).


Ed has also been a contributing editor on Greenroofs.com (2004): the Plant Editor where he answers reader questions, writes occasional articles, and features seasonal greenroof plants in "Ask Ed."


Ed presented "Using a Climate and Ecological Template Approach for Plant Selection for Extensive Green Roofs."







"Biosolar Roofs"



Nathalie Baumann

Basel, Switzerland.   Nathalie Baumann, MSc, (BioGeograph/Social Anthropologist) is a Research Associate at  Zurich University of Applied Sciences (ZHAW), Life Sciences and Facility Management in Wädenswil.  She is a research fellow / research associate with her research field in urban greening and urban ecology; Nathalie is a member of research groups on urban ecology, institute environment, and natural resources.


She accomplished her Master's of Sciences degree at the University of Basel, Switzerland. Afterwards she worked on different projects of NGO's like WWF Switzerland in the context of River Ecology, Biodiversity Assessment, Urban Ecology and Ecology of ground nesting birds.


She has become a leader with the EU and is creating a greater European cooperation within the green roof research world.  A member of the collective UG LAB, Nathalie shares her deep knowledge skillfully by teaching many courses, lecturing internationally, on going research projects and video conferencing.



Dusty Gedge


London, UK.  Dusty Gedge is a green roof campaigner and designer, who has actively promoted green roofs in the UK since 1997.  He has designed a number of seminal roofs and helped develop the London Green Roof Policy.  He is also the current President of the European Federation of Green Roof Associations (EFB), and sits on the EU’s working group for the green Infrastructure and ecosystem services policy.  His work in Europe over the last few years working on a Pan-European green roof course and he is currently advising on a project on green roofs, pollinators and solar power - Biosolar Roofs.


Dusty is co-author of Small Green Roofs: Low-Tech Options for Greener Living, 2011 and DIY Guide to Green & Living Roofs, among other publications.  In 2004 Dusty co-founded Livingroofs.org, a non-profit organisation established to promote, advise upon and seek research into green roofs and similar structures within the context of urban and rural regeneration.  With John Little he has written a small-scale green roof guide to help individuals, buildings and landscape contractors to construct small wildlife friendly green roofs.  He is also a designer of green roofs and other green infrastructure through his consultancy.  Dusty is also a regular speaker at conferences through UK, Europe and the world.


As a birdwatcher first and foremost he has always had a vision that good green infrastructure and green roofs should deliver for biodiversity as well other headline issues connected with cities and climate change adaptation.

Dusty also joined his colleague John Little to talk about "Small Scale Green Roofs."


"Small Scale Green Roofs"




Dusty Gedge

London, UK.  Dusty Gedge is a green roof campaigner and designer, who has actively promoted green roofs in the UK since 1997.  He has designed a number of seminal roofs and helped develop the London Green Roof Policy.  He is also the current President of the European Federation of Green Roof Associations (EFB), and sits on the EU’s working group for the green Infrastructure and ecosystem services policy.


Dusty is co-author of Small Green Roofs: Low-Tech Options for Greener Living, 2011 and DIY Guide to Green & Living Roofs, among other publications.  See his complete profile here.


Dusty also co-presented "Biosolar Roofs" with Nathalie Baumann.



John Little


Essex, UK.  John Little is a landscape contractor and designer.  He is well known in the UK for his seminal work on social housing estates, transforming one estate from an amenity grassland desert to wildlife friendly and food growing paradise.  He is also well known for his work on small scale green roofs both delivered through his company the Grassroof Company.

John is co-author of
Small Green Roofs: Low-Tech Options for Greener Living, 2011 and DIY Guide to Green & Living Roofs, among other publications.  With Dusty Gedge he has written a small-scale green roof guide to help individuals, buildings and landscape contractors to construct small wildlife friendly green roofs.  As a birdwatcher first and foremost, he has always had a vision that good green infrastructure and green roofs should deliver for biodiversity as well other headline issues connected with cities and climate change adaptation.

Greenroofshelters is another of John’s companies that provides modular small green roofed buildings.  The type of buildings that company designs and sells include binshelters, bike sheds and small green roofed freight container buildings.  One of these featured in Nigel Dunnett’s award winning garden at the Chelsea Flower show back in 2011.

John’s garden has featured in many garden and horticulture magazines.  Full of wildflowers and now home a plethora of bee habitat walls and green roofs, it is an oasis of biodiversity in the heart of Essex.


"Stewardship of Rooftop Ecosystems"



Michael Furbish, LEED AP

Pasadena, MD, USA.  Michael Furbish is the President and Founder of Furbish.  He founded the company in 2003 to specialize in aggressively green building systems and development.  Work has included straw-bale construction, natural plasters, solar thermal, passive solar, radiant HVAC, composting toilets, living roofs, and living walls.

Furbish specializes in development, design, installation, and stewardship of build of plant-based building systems.  This specialty focuses on the ecosystem functionality of plants to deliver elegant engineering solutions to building performance.  Living roofs deliver storm water management, heat island effect, energy efficiency, habitat creation, and aesthetic benefits.  Living retaining walls reduce heat island effect, mitigate storm water, facilitate nonpoint-source nutrient discharge, create habitat, and improve aesthetics.  Interior living walls remediate VOC’s to improve indoor air quality while delivering dramatic aesthetic feature.

Michael has given many speeches and lectures about plant performance throughout his career, speaking at Johns Hopkins University, George Washington University and the Delaware Nature Society to name a few.

He earned his BSIE from Georgia Tech and his MBA from Harvard.  Michael maintains his LEED AP designation from USGBC and serves on the Executive Committee of ULI’s Baltimore District Council.



Brad Garner, RLA, GRP

Washington, DC, USA.  Brad Garner is the Director of Operations of Furbish.  Brad is a registered landscape architect with 17 years experience in on-structure and at-grade landscape design, construction, contract administration and maintenance.

Brad is active in all aspects of the living roof and living wall business, but focusing on specification writing, product development, system design, marketing and supply chain.

Brad holds a degree in Landscape Architecture from Mississippi State University.



Whitney Griffin, PhD

Baltimore, MD, USA.  Whitney Griffin is the Director of Stewardship of Furbish.  Prior to joining Furbish full-time, Whitney collaborated with Furbish during her doctoral research at the University of Maryland from 2010 to 2014 on development of EcoCline, Furbish’s proprietary living roof system, developed to provide high stormwater management and a low carbon footprint.

At Furbish, Whitney directs and manages the Stewardship division, which includes initial plant establishment for new projects, and long-term stewardship and care for approximately 150 living roof and living wall projects throughout the mid-Atlantic region.  Primary responsibilities involve developing ecological and horticultural protocols to ensure success, as well as listening to clients to understand their needs and respond in ways that best serve building owners, managers and occupants.

Whitney received her bachelor of science degree as well as her Masters of Science in Horticulture from Auburn University before attending the University of Maryland for her Ph.D. in Plant Science.


"Two Extremes in Waterwise Design from Denver, Colorado and Athens, Greece"



Andrew Clements


Athens, Greece.  Nearly fifteen years ago Andrew Clements began researching bio-climatic architecture and particularly roof greening in 2000, initially for his own needs.  Having purchased a 120-year old farmhouse in the mountains near Corinth, Greece, he searched to find a Greek based green roofer and was dismayed to find that there were none.  Undeterred, he set about discovering how such an endeavor might be accomplished.  The challenge was to create a completely Mediterranean green roof, eco-roof or living roof as it is sometimes known, developed for the building challenges and climate peculiarities of the Mediterranean.

After 6 years of R & D with the invaluable help of a small team of specialists (architects, civil engineers, geologists, meteorologists, eco-system specialists) the first Mediterranean roof greening approach was born in 2006.  It was christened Oikosteges (pronounced eco – steg –gez) which is a compound of two ancient Greek words 'Oiko' from which the Latin 'eco' is sourced meaning 'related to the home' and 'steges' meaning abode, roof over your head.  Oikosteges offer the only real alternative to expensive and inappropriate roof gardens for Mediterranean countries.

Oikosteges' mission is to recreate natural, bio-diverse Mediterranean ecosystems on any and all built structures in the cities and towns of the Mediterranean and in similar climates around the world, using a number of natural approaches which are informed by such concepts as biological succession.  These ecosystems require little or no maintenance and little or no irrigation once established.  The ecosystems are feather lightweight so that they can be applied to virtually any built surface in this active seismic region.

Now Andrew holds two patents for Greek-appropriate green roofs.  Andrew is particularly interested in water-wise, natural, ecosystem development in hot cities like Athens as well as the challenges of working in a seismic region.  Landmark projects include The Greek Treasury building in Constitution Square, Athens.

In addition, the Oikosteges team established Green Roofs Greece, a not for profit organization, which currently boasts a Facebook membership of over 21,000 in order to share experiences and ideas with the worldwide networks of green roof activists, which include the EFB (The European Federation of Green Roof Associations) and WGIN (the World Green Roof Infrastructure Network).



Karla Dakin


Denver, CO, USA.  Growing things, building things, and relishing the chaos, entropy, and generative quality of nature - all are ideal creative means for Karla Dakin, who appreciates change in the process of art and design.  Principal of K. Dakin Design Inc., Karla specializes in artful, environmentally, flexible landscape architecture with an emphasis on knowing context and what feels the most appropriate.

She has completed a diverse array of projects, over 100 residential gardens, as well as many commercial and public projects like “Sky Trapezium,” a permanent green roof installation at the Museum of Contemporary Art / Denver.  In her collaboration with Lisa Lee Benjamin she designed the gardens around the Whole Foods Flagship Store in Boulder, Colorado and the 10,000 sq. ft. green roof atop the Los Angeles Museum of the Holocaust in California.

As co-author of The Professional Design Guide to Green Roofs, 2011, Karla Dakin has lectured on green roofs at the Garden Museum in London, the U.S. Botanic Gardens in Washington D.C. and the Western Landscape Symposium in Pueblo, Colorado.

Dakin combines her landscape architecture expertise—she holds a Master's degree in Landscape Architecture from the University of Colorado, Denver--with fifteen years of experience in the art worlds of New York City, San Francisco, and Los Angeles.


"The Great Green Roof Review: Success & Succession"



Jenny Hill

Toronto, Canada.  Jenny Hill is a member of the Low Impact Development and Groundwater research groups, in Civil Engineering at the University of Toronto.
Her PhD research investigates the relationship between extensive green roof design decisions and their impact on urban hydrology. Jen’s interest in this research arises from her diverse background including an undergraduate degree in Chemistry, and master’s degrees in Forensic Science and Landscape Architecture.




Terry McGlade

Toronto, Canada.  Terry McGlade of Flynn Canada is one of Canada’s best known greenroof experts.  He is a creative, dynamic forward thinking horticulturalist and landscape designer with 30 years of experience and has been designing and building gardens in the Toronto area since 1982.


Terry created his first roof garden in 1985, and installed his first green roof in 1999.



"The Greenroofs.com 2014 Top 10 List of Hot Trends
in Greenroof & Greenwall Design + a Look into 2015"



Haven Kiers, LEED AP, GRP

Davis, CA, USA.
  Haven Kiers, LEED AP, GRP, holds a Master's of Landscape Architecture from UC Berkeley with an undergraduate degree from Brown University.  Haven designs and presents nationally about greenroofs and is a founding partner of GreenSwell Design and Planning.  She is a trainer with Green Roofs for Healthy Cities where she facilitates the Green Roof 101, 201, & 401 Courses.  Haven also teaches courses at the University of California, Davis.  She believes the "greenroof challenge lies in finding the right balance between idealistic principles and cutting edge design."


Haven is also a contributing editor on Greenroofs.com (2005); she is the Design Editor and writes the occasional column "Chic Sustainability."




Linda Velazquez, ASLA, LEED AP, GRP

Alpharetta, GA, USA.  Linda S. Velazquez, ASLA, GRP, LEED AP, is founder and publisher of Greenroofs.com (1999), the international greenroof industry’s resource portal, where she writes and reports extensively about greenroofs.  She holds a Bachelor’s of Landscape Architecture from the University of Georgia (2000) with honors.  Linda is also principal of Sky Gardens Design (2004), a greenroof design and consulting firm.  Read her complete profile here.

Linda co-presented "The Greenroofs.com 2014 Top 10 List of Hot Trends in Greenroof & Greenwall Design + a Look into 2015" with Haven Kiers, as well as acted as your host for the Virtual Summit 2015.




Panel Sessions




"From Passive House to the Cold North—How Vegetative Envelope Components Impact Buildings" Panel



Robert “Bob” D. Cameron, PhD

University Park, PA, USA.  Bob spent more than two decades directing the global environmental programs of a Fortune 30 multi-national conglomerate.  In the late ‘70s in collaboration with NASA, he designed, permitted, and constructed the first constructed wetlands to treat wastewater from the natural gas industry.


Pursuing a life-long goal, he recently earned his doctorate from Penn State University at the Center for Green Roof Research.  Read his complete profile here.


He also presented "Versatile Living Walls & Roofs: International Applications for Agriculture, Energy Conservation, Pollution Attenuation, and Aesthetics."




Amy Chomowicz (Organizer)

Portland, OR, USA.  Amy Chomowicz is the Program Administrator for the Sustainable Stormwater Management Division and the Ecoroof Program, City of Portland Environmental Services.  Amy has worked in the water quality and watershed restoration fields for 23 years and worked on her first ecoroof project in 1997.  Prior to that, Amy worked in energy conservation and renewable energy.


Accepted by Amy Chomowicz, the City of Portland received a 2013 Green Roof Leadership Award for Municipalities from the International Green Roof Association (IGRA) at the 2013 International Green Roof Congress.



Allen Lee, PhD, LEED AP (Moderator)


Portland, OR, USA.  Allen Lee, Ph.D., is an executive director in the Energy Services Division in Cadmus' Portland, Oregon office.  He has more than 25 years’ experience in energy and environmental research and leads a wide range of studies related to energy efficiency and technologies.  His management and technical expertise includes demand side management, energy services, codes and standards, green buildings, externalities analysis, and renewables.  He has managed more than 60 energy program evaluations and a comparable number of other projects.


He has conducted research on the energy and environmental impacts of green roofs for more than 15 years. He co-developed the original green roof energy analysis module for DOE’s EnergyPlus building simulation model.  Dr. Lee has a PhD in policy analysis from the RAND Graduate School, a master of science in aerospace engineering from the University of Southern California and a bachelor of science in engineering from Caltech.

Allen publishes widely on energy issues and has presented papers and made presentations at numerous conferences.  He is a co-author of “Residential Efficiency Crossroads: Opportunities for the Future.” Besides being a Leadership in Energy and Environmental Design (LEED) Accredited Professional, he is a member of the Association of Professional Energy Managers and the Association of Energy Service Professionals (AESP).



Karen Liu, PhD


Toronto, Canada.  Dr. Karen Liu is a Product Manager for Bonar Xeroflor GmbH.  Karen has been conducting green roof research since 2000 when she was a research officer at the National Research Council in Ottawa.  She has also led the green roof research team at British Columbia Institute of Technology in Vancouver, BC.


Karen established the first North American field facility dedicated to green roof research and conducted several field studies across Canada to study the climate sensitivity of the technology.  She now focuses her work on research and product development at Xeroflor.  Karen received her PhD from the University of Toronto, Department of Chemical Engineering and Applied Chemistry.



Christopher G. Wark


New York, NY, USA.  Christopher Wark has 26 years of multidisciplinary engineering experience providing technical and analytical support for manufacturers, universities and national labs.  For the past 12 years, he has focused his efforts on technical solutions in building design and is currently an Associate with BuroHappold Engineering, managing the Analytics group in their New York office.

In 2002, Chris established SHADE Consulting/Green Roof Innovations with his wife Wendy.  With SHADE, Chris developed and marketed several innovative modular eco-roof systems, a roof system heat transfer and cost computer program, and conducted green roof system heat transfer analyses for 5 major cities and organizations.  In 2010, he developed a modular planting system in partnership with Guiyang Chuangjia High-Tech Accelerator Co. LTD in Guiyang, China.

Chris has also been involved in other thermodynamic related work at Caterpillar Inc., Lawrence Livermore National Lab and two private research laser development companies.  He has presented at numerous conferences, has several articles published on a wide variety of engineering topics, and has had the privilege of working directly with several universities, including Stanford’s Center for Integrated Facility Engineering (CIFE) program.

Chris holds Bachelor’s and Master’s of Science degrees in Mechanical Engineering from Washington State University where his graduate work focused on thermodynamics, fluid dynamics and combustion.  He has also been a contributing editor, the Energy Editor, with Greenroofs.com since 2011.  Download Chris Wark's complete 32-page Green Roof Energy Series (PDF, 2011).


"Social Healing with Greening" Panel




Patrick Carey, GRP (Moderator)

Chicago, IL, USA.  Patrick Carey, GRP, has a degree in architecture and is principal of Hadj Design.  Since 2000, Hadj Design has evolved from a design-build green roof and living wall to a research and design organization.  Patrick has designed, installed, or consulted on over 100 green roofs to date.  This work ranges from residential to commercial and institutional, various geometries and global climate regions, and with various performance characteristics such as storm water, food production, healing garden, habitat support, public art, and phytoremediation.


As such, he has been an activist in forming or aiding in the formation of grass roots green roof groups.  His academic background is in philosophy, architecture, and botany/horticulture.  Of people, Patrick states, "Abandon your need to know who he is and judge for yourself the truth of his words.  It doesn’t matter if he is a bum in the park or the Pope.  Think for yourself and don’t relax your critical faculties in the presence of self-inflating hype."
Patrick is a trainer with Green Roofs for Healthy Cities where he facilitates the Green Roof 101, 201, 301, & 401 Courses and has also taught at the University of Washington, Washington State University, and has initiated green roof courses at South Seattle Community College, and Edmonds Community College in Washington State.


Patrick is also a contributing editor on Greenroofs.com (2005); he is the Architecture Editor (2005).  He writes an occasional architectural column entitled "A View from the Sky Trenches," where he selects and discusses pertinent greenroof industry topics.



Peter Ensign, LEED AP BD+C, GRP

Washington, DC, USA.  Peter Ensign has been the Executive Director of DC Greenworks in Washington, DC since 2010.  Peter has overseen the installation of over 70 green roofs, 3500 rain-barrels, dozens of rain and native habitat gardens, and the only rooftop farm in DC.

In 2014 Peter developed and delivered the first green roof maintenance training program, Growing Futures, in the District of Columbia.  Upon completion all of the graduates were employed within 30 days.

Peter has served as a speaker on stormwater issues and green job training through the U.S. Environmental Protection Agency, Green Roofs for Healthy Cities, and the Smithsonian Institution.

Peter envisions a future where rainwater is considered a valuable resource to be harvested and reused for the greater good, requiring a local skilled labor force to perform stewardship of our natural assets.  Peter holds a multi-disciplinary degree in Architecture and Landscape Architecture from the University of Pennsylvania.



George Irwin

Rochester, NY, USA.  George Irwin is founder and President of Green Living Technologies International, LLC (GLTi), a privately held company manufacturing patented Green Living Walls and Green Living Roofs, and is a global pioneer in vertical farming.  Prior to founding GLTi, George was a landscape contractor for 20+ years.  He holds a degree in education and maintains his passion for out-of-the-box learning; he combined his love for environment and zest for teaching into a growing global business.  George personally oversees all green wall and roof education, integrating GLTi's state-of-the-art technology into a continuously-evolving education curriculum.  His efforts have earned him recognition as an education partner for the New York City Department of Education and additional higher education facilities, such as the State University of New York (and other international universities), with the development of a dedicated degree track in "Green Technology / STEM" education.  See his bio on LinkedIn.

GLTi's patented product applications of green walls and roofs include scalable vertical farms utilizing a compost-based growing media (GLTi bioSoil), allowing indoor farming operations 12 months a year to maximize production space including walls, roof, and the vertical floor plan.  It utilizes existing buildings retrofitted with GLTi Vertical Farming technology, state of the art patent pending lighting control systems, nanotechnology, and computer controlled environments.


George is a former contributing editor on Greenroofs.com (2008-2015) where as the Green Wall Editor he shared his own experience as well as industry happenings within the field.



Darius Jones

Chicago, IL, USA.  Darius Jones was born and raised in Chicago's East Garfield Park neighborhood on the city's west side.  He first became interested in urban agriculture while serving a five-month sentence in the Vocational Rehabilitation Impact Center's garden program in 2010.  In 2011, he enrolled in the nine-month Windy City Harvest Apprenticeship program and received his certificate in October of that year.


He began working as the sales coordinator for the program, increasing sales by 100 percent for each of the two years that he had that role.  Today he is the coordinator of the McCormick Place Rooftop Farm.  In 2013, WBEZ Radio named Darius an "Eco-Hero" for his work with urban agriculture ventures in Chicago.


In 2014, he was named one of the Chicago Botanic Garden's Employees of Distinction, and was also awarded one of six "Golden Beet Awards" by the Illinois Stewardship Alliance for the "other varieties" category.




<3 minute videos of research, ideas, projects, poster boards, etc.

Inspiration Nook 

Not presenting?  As an attendee you can submit your under 3 minute (non-overtly commercial) video of research, ideas, projects, poster boards, thought leadership, etc., here which will be followed by your live Q & A Discussion Chat.  Please keep your videos to no more than 2:56.

This series is focused around sparking conversation, ideas, dialogue & connections around a specific greenroof/wall-related topic – a mosaic of bright ideas for a greener world.

Read more about the Inspiration Nook.  Share your short story via video and get networking!  For more info contact Linda at linda@greenroofs.com.



Marc Grañén

Bescanó, Spain.  Marc Grañén says, "My artistic point of view of life and my intense love of natural landscapes make the perfect combination for what has become my daily occupation.  I am a landscape artist.  Nature is my inspiration and my family, my best teacher.  We live in Bescanó, our small hometown in the northeast of Spain.


I’ve created artworks in China, Spain and Russia, and been a speaker in several conferences in the UK, Spain, the Netherlands, China, France… with interviews in media of all continents.  I created PhytoKinetic, the first and unique worldwide patented system to make greenroofs on top of vehicles.  I have created many private greenroof and greenwall projects, and more than a dozen educative edible greenwalls in Barcelona public schools."


Marc presented "Urban and Social Needs of Green."



Christine Thuring

Sheffield, UK.  Christine Thuring has been working with green roofs since 2001 in various capacities, including installation, advocacy, research, consulting, design, and education.  Prior to green roofs, she worked as a field botanist and restoration ecologist.  With a BSc in Environmental Resource Science & Biology (Trent University) and MSc Horticulture (The Pennsylvania State University), Christine is currently doing her PhD in Landscape Ecology (University of Sheffield).  She co-founded Green Roof Safari, and offers consulting and technical translation through Chlorophyllocity.


Christine is a contributing editor on Greenroofs.com; she is the Research Editor (and former Student Editor).  She also writes Christine's Ramblings and contributes to Exclusives.

Christine presented "Soil Ecological Processes on Green Roofs: Research and Observation Meet Theory and Intuition."


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