AT&T has assembled a formidable legal team as it seeks to win regulatory approval of its $39 billion acquisition of T-Mobile USA from Deutsche Telekom. A 75-page listing of confidentiality agreements filed with the Federal Communications Commission on Friday reveals the remaining members of its team, and includes details on counsel to other parties opposing the proposed merger.

Last week the FCC hired Wilson Sonsini Goodrich & Rosati antitrust partner Renata Hesse in Washington, D.C., to help oversee its regulatory review of the mammoth deal. The Justice Department’s antitrust division must also approve any merger. Earlier this month the CEOs of both AT&T and T-Mobile USA appeared before Congress to defend their deal, according to The National Law Journal, a sibling publication.