Lindh became the commission’s general counsel in 2008 after working for 15 years for PG&E.
He will join the Washington, D.C.-based law firm of Crowell & Moring LLP and work on energy law in its San Francisco office, the firm said.
CPUC President Michael Peevey and Commissioner Mike Florio praised Lindh’s contributions to the agency.
“He’s been a champion on behalf of consumers in cleaning up the energy crisis of 2000-2001, helping to win back more than $5 billion for consumers from the sellers who overcharged for electricity,” Florio said.
Lindh said in a statement, “I am very grateful for the opportunity to have served the people of the state of California.”
Lindh is the father of John Walker Lindh, now 33, who was convicted of aiding the Taliban in Afghanistan as a foot solider in 2001. The younger Lindh was sentenced to 20 years in prison.