An expert in mergers and acquisitions and civil and criminal matters before federal agencies, Rosen has worked on billion dollar deals in the telecommunications industry. Previously working for the DOJ and the FTC on competition and antitrust, Rosen’s clients are from the telecommunications, information technology, and media industries. Rosen represented AT&T in the $49 billion acquisition of DirecTV and Cytec Industries in Solvay, S.A.’s $5.5 billion acquisition of the company.