Jeffrey Harris, former associate administrator of the Trump administration’s Office of Information and Regulatory Affairs, has joined the fast-growing litigation boutique Consovoy McCarthy Park as a partner.

Harris, a former clerk to Chief Justice John Roberts Jr., was second-in-charge of a 40-person office overseeing regulations issued by executive branch agencies. He joined the office last August and left last month to become one of five partners in Consovoy McCarthy. The firm has offices in Virginia, New York and Boston.