Angelina M. Galiteva

Chairperson of the Board and Director

Angelina M. Galiteva has 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 is Lead Director of Tecogen. Mr. 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). He was Tecogen's Chief Executive Officer until 2014 when he became Co-Chief Executive Officer until he retired in 2018. Mr. Hatsopoulos was also Chief Executive Officer and Director of American DG Energy Inc. from its inception in 2001 until 2014 when he became Co-CEO. He remained Co-CEO and Director until American DG Energy or ADGE merged with Tecogen in 2017. In addition, Mr. Hatsopoulos was 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.

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.

Earl R. Lewis III


Earl R. Lewis III has served as Chairman of the Board and as Chief Executive Officer and President of FLIR Systems from 2000 through May 2013, and since May 2013 as Chairman of the Board and as a senior consultant to FLIR Systems. Mr. Lewis also served as Chairman of the Board of Harvard Bio Science from 2013 through June 2018, as CEO and President of Thermo Instrument Systems from 1998 to 2000, as President in 1997, and as COO in 1996. Mr. Lewis also served as CEO and President of Thermo Optek Corporation from 1994 to 1996, as President of Thermo Jarrell Ash Corporation from 1988 to 1994, and in senior operations and manufacturing roles at Thermo Jarrell Ash since 1984 and at other companies in previous years. Mr. Lewis holds a B.S. from Clarkson College of Technology.

Abinand Rangesh

Chief Executive Officer and Director

Abinand Rangesh is the CEO and a member of the Company’s Board of Directors. Prior to his appointment as CEO he was the CFO of the company since 2021. He has been with the Company since 2016 and has held roles in various divisions including sales, business development and strategy. Prior to joining Tecogen, he was the CTO of Lumisolair, a solar and wind powered off-grid energy company, COO of Peek You a software company and CEO of Lumi Ventures where he oversaw multiple startup investments for a high net worth investor. In addition, Dr. Rangesh has multiple design patents and has published multiple scientific papers in peer reviewed journals. Dr. Rangesh earned both his Ph.D. and engineering degree from the University of Cambridge, United Kingdom.

Dr. John M Albertine


Dr. Albertine has served on the Board of numerous public companies including Fruit of the Loom, Thermo Electron Corporation (now Thermo Fisher Corporation), American Precision Industries, Intersections Inc, DynaTech Corporation and Kadant inc.  He has also served as the Vice Chairman of the Fruit of the Loom Company and has served on two Presidential Commissions under President Reagan. Presently he is the CEO of Albertine Enterprises Inc. a public policy and advocacy firm based in Washington DC. He is also the Managing Partner at JJ&B an investment banking firm. Dr. Albertine has a Ph.D. in Economics from the University of Virginia and Doctor of Humanities (honorary) from King’s College, PA. He was also the Chair of the Economics Department at the Mary Washington College of the University of Virginia and an Adjunct Professor at the US Marine Corps, Command and Staff College at Quantico.

Susan Hirsch


Ms. Hirsch was formerly Managing Director and Portfolio Manager for the TIAA Large Cap Growth Fund. Over the 15 years that she managed the fund, the assets under management grew to more than $20bn. She is presently on the board of Agenus, a publicly traded biotechnology company, a Trustee for the Baruch College Fund and an advisor for the High Atlas Capital Fund.