Effective March 1, San Francisco-based PG&E Corp. has named Geisha Williams, 55, CEO. She is currently president of the electric operations side of Pacific Gas and Electric Co. (PG&E). Current CEO Tony Earley, 67, was elected executive chair of the PG&E board, which also elected Nick Stavropoulos, 58, current PG&E president for gas operations, as president/COO of the parent company.