With two megamergers pending, the Federal Communications Commission on Monday announced the legal teams that will review the $45 billion combination of Comcast Corp. and Time Warner Cable and the $48 billion merger of AT&T Inc. and DirecTV Inc.

General Counsel Jonathan Sallet, a partner at O’Melveny & Myers before joining the agency in 2013, will chair the steering committee that will oversee both deals. The FCC evaluates telecom mergers to ensure that they are in the public interest.