As part of a broader set of management succession plan changes, Sempra Energy announced selection of new CEOs to run its two California utility and U.S. Gas & Power units. Under the changes, current CEO of the gas/power subsidiary, Jeffrey Martin, 51, will become CEO of San Diego Gas and Electric Co.; current COO Dennis Arriola, 52, becomes CEO at Southern California Gas Co.; and Patricia Wagner, 51, Sempra's current vice president for parent company audit services, becomes CEO of U.S. Gas & Power.