Mr Filsinger will oversee all aspects of Calpine’s operations including power, commercial, environmental health and safety, engineering and project development. Previously, Mr Filsinger served as head of Calpine’s commercial operations, which includes oversight of trading, origination and structuring activities, budget management and fleet optimization and dispatch.

Mr Filsinger’s experience in the electric utility industry spans more than 20 years. He has engaged with major merchant sector utilities to include restructuring, financing and evaluation of generation, distribution, transmission and gas properties, the development of critical commercial growth strategies and green house gas strategies.

William Patterson, chairman of Calpine, said: Calpine’s board of directors is pleased that in his expanded role, Todd will be applying his broad industry knowledge and experience across all of Calpine’s operations. Separately, our search for a new CEO to lead Calpine is under way and is progressing well.