Warren Rosborough is a partner in the law firm of McDermott Will & Emery LLP and is based in the Firm’s Washington, D.C., office. He focuses his practice on defending mergers and acquisitions before the Department of Justice and Federal Trade Commission and on antitrust-related litigation and counseling. Most of his experience involves technical and industrial products and markets, but he also has significant experience in beverage alcohol and media

In connection with defending clients before the Department of Justice, Warren has implemented advanced technology-assisted review methods in cooperation with the agency, resulting in a narrowly tailored production and reduced cost for the client. He was part of the McDermott team that was the first to use technology-assisted review according to DOJ’s specifications in responding to a Second Request.

From 2008 through early 2012, Warren served as a Trial Lawyer at the Antitrust Division of the U.S. Department of Justice. In that position, he led several merger investigations, and participated in many others, in a wide range of industries, including media, satellite communications equipment, defense RADAR equipment, satellites and spacecrafts, oil services equipment, aluminum cable sheathing, aerospace grade semiconductors, municipal waste, commercial trucks, enterprise resource software and flexible packaging.

During law school, Warren served as managing editor of Law and Policy in International Business (now the Georgetown Journal of International Law). He also received a Master’s in Public Policy degree and earned the Herbert Roback Scholarship awarded by the National Academy of Public Administration.

Prior to law school, Warren worked as a mechanical engineer designing and developing precision systems for the aerospace and semiconductor industries.

Warren is a member of the Antitrust Section of the American Bar Association. He is admitted to practice in Maryland and the District of Columbia.