Less than a month after he joined McKenna Long & Aldridge, ex-gubernatorial aide Richard Costigan has jumped ship to return to his former firm, Manatt, Phelps & Phillips.

George Kieffer, a partner and leader of Manatt’s government and regulatory division, confirmed Tuesday that Costigan, California Gov. Arnold Schwarzenegger’s former legislative secretary, will rejoin the firm’s government affairs division in the coming days. Costigan was a lobbyist and senior adviser with Manatt until 2003 when he became the California Chamber of Commerce’s chief legislative liaison. He joined the fledgling Schwarzenegger administration later that year.