MercuryAdam Levine, the former communications exec for private equity giant TPG locked in a legal battle with the firm, has joined Mercury to set up a San Francisco outpost.

TPG sued Levine in January, accusing the former Goldman Sachs and Bush White House PR staffer of leaking information to the press to harm the firm. Levine countered with a whistleblower suit, claiming TPG violated securities laws and made misrepresentations to investors.

Levine takes a managing director role with Omnicom-owned Mercury. Partner Fabian Nunez said Levine brings "incredible talent and leadership" to the firm.

In addition to the TPG post, he was VP and spokeman for Goldman Sachs and assistant White House press secretary and director of TV news for President George W. Bush.

He started out on Capitol Hill and moved into TV journalism with NBC News and ABC TV.