Board of Directors

Angelina M. Galiteva

Chairperson of the Board and Director

Angelina M. Galiteva been the Company's Chairperson of the board of directors since 2005. Ms. Galiteva is founder and Chair of the Board for the Renewables 100 Policy Institute, a non-profit entity dedicated to the global advancements of renewable energy solutions since 2008. She is also Chairperson at the World Council for Renewable Energy (WCRE), which focuses on the development of legislative and policy initiatives to facilitate the introduction and growth of renewable energy technologies since 2003. Since 2011, she has served on the Board of Governors of the California Independent System Operator (CA ISO), providing direction and oversight for the CA ISO which operates the California electricity grid. Also, she is a principal at New Energy Options, Inc., a company focusing on advancing the integration of sustainable energy solutions since 2006. She has also been a strategic consultant with Renewable Energy Policy and Strategy Consulting since 2004. Ms. Galiteva holds a M.S in Environmental and Energy Law, a J.D. from Pace University School of Law, and a B.S. from Sofia University in Bulgaria.

John N. Hatsopoulos

Lead Director

John N. Hatsopoulos has been a member of the Company's board of directors since its founding in 2000 (other than the period between June 6, 2018 and February 1, 2019) and was Tecogen's Co-Chief Executive Officer until March 29, 2018. He also was the Co-Chief Executive Officer of American DG Energy Inc., or ADGE, until ADGE merged with the Company in May of 2017, or the ADGE Merger, and was on the board of directors of ADGE until March 29, 2018. Mr. Hatsopoulos was the Chairman of EuroSite Power Inc., a former affiliate of the Company, from 2009 until 2016. Mr. Hatsopoulos is a co-founder of Thermo Electron Corporation, which is now Thermo Fisher Scientific. He was formerly the President and Vice Chairman of the Board of Directors of that company. He is a former Member of the Corporation of Northeastern University. He graduated from Athens College in Greece and holds a B.S. in history and mathematics from Northeastern University, as well as honorary doctorates in business administration from Boston College and Northeastern University. On February 1, 2019 Mr. Hatsopoulos was reappointed by the Board as a director and he is currently serving as Lead Director to identify and evaluate financing alternatives for the Company.

Benjamin M. Locke

Director & Chief Executive Officer

Benjamin M. Locke has been a member of the Company's board of directors since June 2018. Mr. Locke has been the Company's Co-Chief Executive Officer since 2014 and as of March 29, 2018 he became the sole Chief Executive Officer of Tecogen. Mr. Locke was the Director of Corporate Strategy for Tecogen and was promoted to General Manager prior to his appointment as Co-Chief Executive Officer of Tecogen. In October of 2014, Mr. Locke began serving as Co-Chief Executive Officer of ADGE and continued to serve as Co-Chief Executive Officer until the completion of the ADGE Merger. Previously, Mr. Locke was the Director of Business Development and Government Affairs at Metabolix, a bioplastics technology development and commercialization company. In that role, he was responsible for developing and executing plans for partnerships, joint ventures, acquisitions, and other strategic arrangements for commercializing profitable clean energy technologies. Prior to joining Metabolix in 2001, Mr. Locke was Vice President of Research at Innovative Imaging Systems, or IISI, a high-technology R&D company. At IISI, he drove the development and implementation of growth strategies for the funding of specialty electronic systems for the United States Government. Mr. Locke has a B.S. in Physics from the University of Massachusetts, a M.S. in Electrical Engineering from Tufts University, and an M.B.A. in Corporate Finance from Boston University.

Keith Davidson


Keith Davidson has been a member of the Company's board of directors since 2016. Mr. Davidson is President of DE Solutions Inc., a consulting and engineering firm serving the distributed energy markets. With over 25 years of experience in the energy industry, Mr. Davidson has focused on environmental technology development, feasibility studies, product commercialization, application engineering, economic analysis and market development. Prior to joining DE Solutions, Mr. Davidson was President of Energy Nexus Group and Senior Vice President of Onsite Energy Corp. He served as a Director of the Gas Research Institute for over a decade, was past President of the American Cogeneration Association, served as Chair of the National Association of Energy Service Companies' Distribution Generation Committee, and is the recipient of several industry honors. Mr. Davidson is currently active in the California Clean DG Coalition and the US Combined Heat and Power Association. He holds a M.S in Mechanical Engineering from Stanford University and a B.S. from the University of Missouri, Rolla. Mr. Davidson has a long history with Tecogen, actively supporting new business initiatives as well as being instrumental in securing utility and government funding to support product development, including the Ultera technology.

Ahmed F. Ghoniem


Ahmed F. Ghoniem has been a member of the Company's board of directors since 2008. Dr. Ghoniem is the Ronald C. Crane Professor of Mechanical Engineering at MIT. He is also the Director of the Center for 21st Century Energy, and the head of Energy Science and Engineering at MIT, where he plays a leadership role in many energy-related activities, initiatives and programs. He joined MIT as an Assistant Professor in 1983. He is an associate fellow of the American Institute of Aeronautics and Astronautics, and Fellow of American Society of Mechanical Engineers. He was recently granted the KAUST Investigator Award. Dr. Ghoniem holds a Ph.D. in Mechanical Engineering from the University of California, Berkeley, and a M.S. and B.S. in Mechanical Engineering from Cairo University.

Charles T. Maxwell


Charles T. Maxwell has been a member of the Company's board of directors since 2001. Mr. Maxwell is a widely recognized expert in the energy sector, with over 40 years of experience with major oil companies and investment banking firms. From 1999 until his retirement in 2012, Mr. Maxwell was a Senior Energy Analyst with Weeden & Co. of Greenwich, Connecticut, where he developed strategic data and forecasts on oil, gas, and power markets. Mr. Maxwell was a member of the Board of Directors of ADGE until the completion of the ADGE Merger. Mr. Maxwell holds a B.S. in Political Science from Princeton University and holds a B.A. from Oxford University as a Marshall Scholar in Middle East literature and history.

Deanna Petersen


Deanna Petersen has been a member of the Company's board of directors since 2017. Ms. Petersen has been Chief Business Officer at AvroBio since January of 2016. She was Vice President of Business Development for Shire Human Genetic Therapies from 2009 until 2015, where she initiated and managed partnering, licensing and merger and acquisition activities worldwide. From 2002 to 2009, Ms. Petersen was Vice President of Business Development for Agenus Inc., and from 1998 to 2002 she was Vice President and Executive Director of Business Development at Coley Pharmaceutical Group, Inc. Ms. Petersen was on the board of ADGE until completion of the ADGE Merger. Ms. Petersen is on the board of directors for the Massachusetts Biotechnology Association and was previously the Treasurer of the board of directors for the Healthcare Business Women’s Association, Boston Chapter. Ms. Petersen holds a B.S. in Biology from Iowa State University and a M.B.A. from the University of Iowa.