(November 2007) Pacific Gas and Electric Co. elected William D. Arndt to the newly established post of vice president, project management and program office. Calpine Corp. promoted Zamir Rauf to treasurer and senior vice president of finance. FirstEnergy Corp. named William D. Byrd director of rate strategy, vice president and chief risk officer. The U.S. Nuclear Regulatory Commission assigned David Dumbacher as senior resident inspector at the Callaway nuclear plant, near Fulton, Mo. And others...