Eric Holder is returning to private law practice, rejoining the same firm where he worked before becoming attorney general.

The firm of Covington & Burling announced Monday that Holder, who left the Justice Department in April after more than six years as attorney general, would be rejoining the firm as a partner.

Holder will be based in Washington and will focus on complex investigations and litigation.

He worked at the firm from 2001 until 2009, when he became attorney general. Several other former high-ranking Justice Department officials are also partners at Covington.

Holder has also served as a judge, a prosecutor and as a United States attorney for Washington, D.C.