Robert Lamkin, 45, has joined McDermott Will & Emery’s Wash­ington office as a partner in the energy advisory practice group. He focuses his practice on energy trading and regulatory matters, with an emphasis on the electric power sector. Previously, he was a partner at Greenberg Traurig. He earned his J.D. from Catholic University of America Columbus School of Law.

ORRICK, HERRINGTON & SUTCLIFFE

Christina Sarchio, 43, has joined Orrick, Herrington & Sutcliffe’s Washington office as a partner in the commercial litigation practice. Sarchio focuses her practice on commercial litigation, antitrust and white-collar criminal defense. Previously, she was co-chairwoman of Patton Boggs’ government-investigations and litigation practice group. She earned her J.D. from George Washington University Law School.

STRADLEY RONON STEVENS & YOUNG