CPN Calpine Corp.

Calpine Corporation (NYSE:CPN) announced today that Thad Hill has been named Executive Vice President and Chief Commercial Officer. Mr. Hill will have responsibility for commercial and power operations. He succeeds Todd W. Filsinger who was Interim Chief Operating Officer since May 2008. Mr. Filsinger will return to his responsibilities as a Managing Partner at PA Consulting Group. �Thad brings to Calpine valuable industry knowledge and experience,� said Calpine Chief Executive Officer Jack A. Fusco. �His proven ability to apply his expertise across both commercial and power operations will make him an important addition to our executive team.� �I would like to thank Todd for his tireless efforts helping Calpine during restructuring and since Calpine�s emergence from bankruptcy,� added Mr. Fusco. Thad Hill most recently was Executive Vice President of NRG Energy since February 2006 and President of NRG Texas since December 2006. Prior to joining NRG, Mr. Hill was Executive Vice President of Strategy and Business Development at Texas Genco. From 1995 to 2005, he was with Boston Consulting Group Inc., where he rose to Vice President and Director and led the North American energy practice, serving companies in the power and gas sector with a focus on commercial and strategic issues. Mr. Hill received his bachelor of arts degree from Vanderbilt University magna cum laude and a master of business administration degree from the Amos Tuck School of Dartmouth College, where he was elected an Edward Tuck Scholar. About Calpine Calpine Corporation is helping meet the needs of an economy that demands more and cleaner sources of electricity. Founded in 1984, Calpine is a major U.S. power company, currently capable of delivering nearly 24,000 megawatts of clean, cost-effective, reliable, and fuel-efficient electricity to customers and communities in 18 states in the United States. The Company operates low-carbon, natural gas-fired, and renewable geothermal power plants. Using advanced technologies, Calpine generates electricity in a reliable and environmentally responsible manner for the customers and communities it serves. Please visit www.calpine.com for more information. Forward-Looking Statements In addition to historical information, this release contains forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. Words such as "believe," "intend," "expect," "anticipate," "plan," "may," "will" and similar expressions identify forward-looking statements. Such statements include, among others, those concerning expected financial performance and strategic and operational plans, as well as all assumptions, expectations, predictions, intentions or beliefs about future events. You are cautioned that any such forward-looking statements are not guarantees of future performance and that a number of risks and uncertainties could cause actual results to differ materially from those anticipated in the forward-looking statements. Unless specified otherwise, all information set forth in this release is as of today's date and Calpine undertakes no duty to update this information. For information about such risks and uncertainties, please refer to Calpine's Annual Report on Form 10-K for the fiscal year ended December 31, 2007, and any other recent Calpine report to the Securities and Exchange Commission. These filings are available by visiting the Securities and Exchange Commission's website at www.sec.gov or Calpine's website at www.calpine.com.