Sean leads Urban Green’s Research team. He is responsible for identifying and executing studies that reveal industry trends and influence building design. He has worked in the energy and utility space for over 10 years and has specialized in building science and analysis. Sean has improved energy efficiency and asset maintenance programs at Pacific Gas & Electric and Sempra utilities in California. He has conducted research with the NRDC and USGBC, managed mechanical design projects with Integral Group and helped sustainability software startup Sefaira build its product and develop a portfolio of architectural and engineering clients. He has worked on hundreds of commercial, educational and specialty projects across North America to optimize envelope and HVAC design. He holds a B.S. in Mechanical Engineering from Carnegie Mellon University and a M.S. in Civil Engineering from Stanford University.

Chris Halfnight leads Urban Green’s policy initiatives, working with stakeholders and policymakers to advance energy efficiency and green building in New York City and State. He was Vice Chair of and managed the 80x50 Buildings Partnership, a collaboration of more than 40 leading stakeholders to shape an energy performance policy for NYC’s large buildings. Prior to Urban Green, Chris was an attorney at Shearman & Sterling LLP and worked on energy policy at the Yale Center for Environmental Law and Policy and the Natural Resources Defense Council. He holds a Bachelor of Arts, Bachelor of Laws, and Bachelor of Civil Law from McGill University, as well as a Master's in Environmental Management with a specialization in energy from the Yale School of Forestry and Environmental Studies.

Ellen oversees the development of Urban Green's Public Programs. She is also responsible for developing curriculum for Urban Green's signature programs including GPRO, a national green building certificate program for Contractors, Building Managers/Operators and Trades and Conquering the Energy Code, a training program for Architects and Engineers. Ellen has 28 years experience as an architect and volunteered for Urban Green for several years before joining the staff, where she served as the first Residential Green Building Advocate for Urban Green Council, working to increase green building and LEED for Homes certification in the New York residential marketplace, and as a committee chair of the Green Codes Task Force. In addition, Ellen taught at the 1,000 Green Supers program for SEIU Local 32 BJ Thomas Shortman Training Fund, and holds a number of BPI certifications. Ellen is a co-founder of Solarize Brooklyn, and Sustainable Kensington Windsor Terrace.

Richard Leigh is a Visiting Professor of Physics at Pratt Institute, primarily teaching courses in building science. He formerly served as Urban Green's Director of Research, where he managed research projects including the 2016 New York City Auditing and Benchmarking Report for 2013 data and 90 by 50, showing that New York City can reduce its greenhouse gas emissions 90 percent below current levels by 2050. Earlier, he provided support to the proposals of the Green Codes Task Force, an effort to “green” the NYC Building Code, and provided curriculum content for GPRO, the green building skills training program. Active in the field of energy-efficient engineering and systems studies for over twenty years, he holds a PhD in Physics and is a Professional Engineer in New York State, and a LEED AP.  

Danielle is responsible for working on Urban Green’s policy initiatives in New York City and New York State. She previously worked at the Center for Climate Systems Research at Columbia University’s Earth Institute researching and communicating local climate risk information for stakeholders in global cities and ecosystems, and served as project manager for the Third New York City Panel on Climate Change Report. Danielle also worked for non-profits in Buffalo on environmental education and advocacy. She holds a Masters Degree in Climate and Society from Columbia University and a Bachelor of Science in Environmental Studies from the University at Buffalo.

Adam is responsible for conducting data analysis and research into sustainability topics. Prior to Urban Green, Adam worked at a non-profit healthcare company that was dedicated to using the Affordable Care Act to expand access to services and lower the cost of healthcare in New Mexico. Adam hold a B.S in Mathematics and Economics from the University of Oregon and a M.A in Economics from the New School for Social Research.  

Liz manages administrative and business processes at Urban Green, overseeing information technology, human resources, and office administration. She also manages the delivery of our workforce training courses, GPRO and Conquering the Energy Code, focusing on continual improvement of internal processes and customer satisfaction.  She has over ten years of non-profit experience and a passion for creating positive change in communities, having worked with organizations including Turnaround for Children, The Brooklyn Young Mothers’ Collective, and Free Arts NYC. Liz holds a B.A. from Hampshire College and a M.A. from New York University.