An aide to Gov. Arnold Schwarzenegger has been appointed vice president at the managed healthcare provider Health Net Inc. Press secretary Margita Thompson will take over as vice president of communications for the Woodland Hills company. Thompson joined the governor’s office in 2003 from CNN, where she served as a producer for Larry King Live. She has also worked for Sen. Pete Wilson, former L.A. Mayor Richard Riordan; the presidential campaigns for Bush-Quayle in 1992 and Bush-Cheney in 2000; and in the White House.