Prior to this appointment, Mr Dreyer served as CEO and was a member of the board of directors of Horizon Wind Energy. Mr Dreyer helped Horizon Wind Energy to develop, build and operate wind farms in the US states of Washington, Oklahoma, New York, Texas and Illinois.

Preceding this, Mr Dreyer served as president of electricity utility Dynegy’s generation division, where he managed approximately 13,000MW of generation with 10 officers and approximately 1,200 employees.

Robert Chiste, chairman and CEO of Comverge, said: Alec’s extensive business background of over 28 years, primarily in the energy industry with focus on renewable energy and long-term power purchase contracts, will bring added depth and experience to our board. We are looking forward to continuing as a leader in developing the clean energy sector through our experienced leadership, innovative business models, and unique solutions.