Floris Keverling Buisman

Chief Executive Officer and Technical Director

Floris has a Master’s degree from the Delft University of Technology, School of Architecture, in the Netherlands. He built the Lucy House at the Rural Studio in Alabama, and worked at Common Ground Community in New York City. Floris has served on several NYC Building code committees regarding materials, efficiency and blower door testing. Floris is a LEED AP, Certified Passive House Consultant, WUFI-ORNL instructor, and a founding board member of New York Passive House. Floris is an adjunct professor at The City College of New York and has been a guest critic at Pratt Institute and Columbia University. His kids enjoy riding on the cargo rack of his 1946 dutch grandma bike for drops off at school and his commute to work.

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Ken Levenson

Chief Operating Officer

Ken has been a registered architect in New York State since 1993. He has a Bachelor of Architecture degree from Pratt Institute. Ken is a Certified Passive House Designer, a founding board member of New York Passive House, the National Passive House Alliance and the North American Passive House Network. Ken has served on advisory panels for Urban Green’s 90 by 50 advanced policy report and the Framework Guidelines for Energy Efficiency Standards in Buildings of the United Nations Economic Commission for Europe. When Ken isn’t thinking about Passive House or hanging out with his wife and young daughters, he can usually be found walking their 180 lb Newfoundland dog, Romeo, in Prospect Park.

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Craig Toohey

Director of Sales

After graduating from McGill University’s Desautels Faculty of Management, Craig spent two years working in Montreal for a restaurant developer, then moved to Seattle, where he was involved in sales and energy efficiency program management for a large solar and water heating company. Having volunteered for a number of other thought-leading institutions from Climate Solutions to the Northwest Energy Angels, Craig brings a passion for and commitment to environmentally and economically smart solutions. Craig is a Certified Passive House Tradesperson and a PHIUS Certified Builder. Craig enjoys cooking, playing a variety of musical instruments such as the saxophone, piano, and guitar - and once played a gig to commemorate the life of the Jean-Paul Riopelle, Canada's first painter to gain widespread international recognition.

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Johnny Rezvani

Director of Communications

John began his career in sustainability in 2009 when he became involved in co-authoring the first Climate Action Plan for The Evergreen State College in Washington State. He collaborated community-scale sustainability plans in the Pacific Northwest before moving to New York City and catching the Passive House bug. He holds a degree in Sustainability Planning from The Evergreen State College and a Masters of Science degree from The City College of New York’s Sustainability in the Urban Environment program. Johnny is a Certified Passive House Consultant. Johnny is a life-long music lover, and spent a few years of his twenties as a full-time touring musician, currently writing and recording under the moniker JD Reverie and organizes a monthly songwriter salon at a bar in Bushwick called Cobra Club.

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Philip Miceli

Director of Operations

Phil comes to 475 with a B.S in Industrial Engineering from NY Institute of Technology and an M.B.A. from Hofstra University. After a successful career spanning engineering, consulting, banking, commercial real estate, sales, and marketing (online and offline), Phil decided to follow his passion for sustainability. He earned a professional certificate in Sustainable Design Construction and Development from New York University and a LEED GA accreditation. He is a certified Passive House Tradesperson. Phil loves to scuba dive with sharks, manta rays and other large animals - diving all over the world from Fiji, to the Caribbean, and Greece.

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Matt Cull

Director of Finance

Matt graduated from NYU Tisch School of the Arts in 2005. He then worked as a production accountant at ITV Studios and Vice Media. At Vice Media, Matt became the head of accounting. He is also a critical home repair construction volunteer for Habitat for Humanity NYC and is a Certified Passive House Consultant. Matt is also a licensed small unmanned aircraft aerial system pilot and has flown over many 475 projects as well as shoots, edits and produces 475 videos. Matt is an Ironman triathlete and a beer nerd.

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Charlotte Abele

Building Science Engineer

Charlotte as an engineering degree in building engineering from Ecole Nationale des Travaux Publics de l’Etat and a master’s degree in fluid and transfer mechanics from Joseph Fourier University, in France. After, Charlotte joined CSTB, the French equivalent of Oak Ridge National Laboratory - where, over 10 years, she conducted research on the risks of interstitial condensation, moisture accumulation, and durability of building enclosures. After initially visiting New York City 10 years ago, Charlotte vowed never to live here - but in 2016 she moved to Carroll Gardens in Brooklyn - and can now only wonder what the future will hold.

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Amani Aly


Amani obtained a Bachelor of Science degree in Business Administration from NYU Stern School of Business while majoring in Accounting. Upon graduating, Amani worked with the NYC Dept of Finance as a tax auditor and within a year moved to the private sector to work as a Staff Accountant and then subsequently as a Client Finance Executive with a leading advertising agency. Taking time off to raise her kids, she later went on to work independently as an accountant and bookkeeper with a diverse portfolio of clients including 475. She is passionate about preserving the environment and living a more natural and holistic lifestyle.

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Lucas Johnson

Western Regional Manager

Lucas is a building scientist who has worked as a builder, utility program manager, enclosure systems consultant, and clean tech venture capital consultant to deliver Zero Net Energy, Passive House, Living Future, and even two of his own standards: SUN Buildings and Active House. Lucas holds a degree in Physicochemical Biology as well as a Master of Environmental Science and EcoEntrepreneurship. His position at 475 is his dream job since he gets to share his experience by collaborating with architects, engineers, and builders to make their projects cost-effective, carbon negative, healthy, durable, and enjoyable.

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Oliver Klein

Regional Sales Consultant for New England

Oliver comes to 475 following a wide-ranging career in engineering and architecture. He graduated from Dartmouth College in 1993 with a Master of Science in Materials Science and then in 2008 from Boston Architectural College with a Master of Architecture. Oliver is a registered architect in Massachusetts, a Certified Passive House Consultant and a LEED Accredited Professional. Oliver brings to his sales work a deep concern for building science, sustainability and love of music. He was a violinist in the Panama National Symphony.

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Jeremy Latriano

Technical Support Engineer

Jeremy has a Bachelor of Science in Energy Business and Finance from Pennsylvania State University and will hold a Master of Science, Sustainability in the Urban Environment from the City College of New York. He has been an intern at Urban Green in New York City, a superintendent at Coastal Enterprises on Long Island and a benefits coordinator at PSC-CUNY Welfare Fund. On his 18th birthday, Jeremy jumped out of a plane with his mother.

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Connie Lawless

Office Manager

Connie studied business administration at Baruch College. Her experience extends from being an administrative assistance at Lehman Brothers to an executive assistant at Citibank, to part-time bookkeeping. Connie is a avid volunteer for the Brooklyn Botanic Garden as a docent, her block association as the financial secretary, a board member of the Crown Heights North Association and she is a member of Brooklyn Community Board 8. Connie loves gardening, composting and marathon running.

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Ben Leer

High Performance Daylighting Specialist

Ben has a varied background combining knowledge from construction, design, earth science, sustainability, and hospitality. He graduated from City College of New York with a Master’s in Sustainability in the Urban Environment with a focus on architecture. He has a passion for creating environmentally friendly building and is deeply committed to the Passive House movement Ben advocates for personalized customer service, on-site training, and hands-on assistance - and to prove it, at Paul McCartney’s wedding at which he was working, he did a margarita shot with Yoko Ono, Michael Bloomberg and Steve Buscemi.

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Erika Mayer

Product Consultant for Quebec and Ontario

Erika graduated with a Bachelor's degree in Architecture from Carleton University in Ottawa, ON. For over 15 years she has worked as a building industry liaison with a focus on sustainable buildings. Erika was one of the first employees of the Canada Green Building Council and helped bring LEED to Canada. She is a LEED AP BD+C, certified Project Manager (PMP), and a natural solution provider who will be able connect those designing, building, and constructing high-performance buildings with the best solutions to meet their project goals. Erika competed in short track speed skating and used to be a hockey goalie.

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Aaron McCormack

Technical Sales Engineer

Aaron has joined 475 from our European partners Ecological Building Systems in Ireland where he served as a Technical Sales Engineer for the last 4 years. He holds a Bachelor of Science Degree in Architectural Design and Technology from Cardiff Metropolitan University. Aaron is a Certified Passive House Consultant. He stays connected to his homeland competing in regular hurling matches in Gaelic Park, in the Bronx.

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Jim Muhaw

Product Consultant, Mid-Atlantic Region

Jim graduated from Fairleigh Dickinson University with a Bachelor of Science in Marketing & Management. After completing college Jim chose the medical device industry due to its technical and hands-on aspects that were constantly changing. During that time Jim renovated several of homes that he lived in, always with an eye toward energy efficiency and wondered how he could transition his career into the building industry. Jim then decided to go back to school to become a licensed New Jersey Home Inspector. Jim is a Certified Passive House Tradesperson (CPHT), loves the outdoors and is known by his family to be able to make a great meal from anything in the kitchen. He is also on a life quest to make the perfect French baguette in the US.

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Savini Nenmini

Technical Support Engineer

Savini is a Civil Engineer with a graduate degree in Environmental Engineering from Stanford University, and a civil engineering bachelor’s degree from the Malaviya National Institute of Technology Jaipur. Before joining 475 Savini studied truck-trailer fleet energy efficiency in New Jersey at East West Hauling, and researched environmental impacts and risk assessments at the National Environmental Engineering Research Institute in Nagpur, India. On her nights and weekends Savini supports a Buddhist organization dedicated to upholding the dignity and equality of all life.

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Ian Nimmo

Account Manager for WA & OR

Ian graduated from the University of Puget Sound with a degree in International Politics in 2008. Ian's always had a focus on sustainability and energy conservation working for Greenpeace as a canvasser on busy Seattle streets, as a Project Manager for a commercial LED lighting rebate program, and most recently working on regional energy efficiency and indoor air quality studies in the Northwest. Ian is a certified Building Analyst through the Building Performance Institute and has over 5 years of commercial and residential energy auditing experience. Ian loves connecting with the natural world via hiking, backpacking, mountain biking, skiing, surfing, stargazing, and swimming in chilly alpine lakes.

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Nick Shaw

New York Product Specialist

Nick is a PHIUS certified Consultant and Builder, familiar with a variety of high performance techniques as a self-described sustainable design nerd. Nick has been working in the green building field for 8 years primarily on integrated design-build projects, has a BA in Environmental Studies with a concentration in Environmental Education from Warren Wilson College, and is very excited by the number of high performance buildings going up in New York. Nick spends his free time enjoying the outdoors by hiking, rock climbing, fly fishing, and snowboarding.

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Shaun St-Amour

Product Consultant for BC & Alberta

With a degree in Wood Products Processing, Shaun graduated from The University of British Columbia. He is a certified Passive House Tradesperson and obtained a Building Construction Technology Associate Certificate from BCIT while working with Viceroy Homes and BOSA Construction. You may have seen him in social media recently traveling around with the Ice Box Challenge where he helped educate the public on the benefits of Passive house building in Vancouver, Seattle, Philadelphia and New York. Education is another passion for Shaun as he now is involved with teaching the Passive House Tradesperson course at BCIT and is working towards building their high performance building lab. If Shaun isn’t talking about passive houses, he’s playing Lego with his two daughters or working on his hubby-do list for his wife.

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