Tecogen Inc. announced that John Hatsopoulos, the company's Co-CEO and co-founder, has decided to retire as an officer and not run for re-election to the Board of Directors of Tecogen Inc. at the 2018 annual meeting. He will remain a Director of American DG Energy (ADGE) and Ultera Technologies Inc. He will also continue to be actively involved with the company as an advisor to the board and Co-CEO Benjamin Locke and as an employee responsible for investor relations. Upon his retirement, Mr. Hatsopoulos will assume the title of Chairman Emeritus.

Mr. Hatsopoulos will resign from the position of member of the Board of Directors, effective June 30, 2018.