HOUSTON–(BUSINESS WIRE)–XGS Energy, Inc. (XGS), a developer of next-generation geothermal power systems, today announced the appointment of Richard Chong as Chief Financial Officer. Richard brings over 25 years of energy finance leadership, spanning public and private equity and credit, project finance, and strategic planning. Richard joins XGS from Calpine Corporation, one of the largest independent power producers in the United States, where he served in financial leadership for nearly two