Photograph of Martin J. Mackowski


  • Loyola University Chicago, B.A. political science (2005) magna cum laude
  • Boston College Law School, J.D. (2010) cum laude


  • District of Columbia
  • Massachusetts
Martin J. Mackowski, Associate Washington, D.C.
Phone: +1 202.624.2616
1001 Pennsylvania Avenue NW
Washington, DC 20004-2595

Martin J. Mackowski is an associate in Crowell & Moring's Washington, D.C. office and a member of the firm’s Antitrust Group. Marty represents clients in a broad range of civil and criminal antitrust matters, including government merger and conduct investigations, merger challenge litigation brought by the Department of Justice and the Federal Trade Commission, and civil antitrust litigation initiated by private parties. He has handled matters in a broad range of industries, including energy, retail, technology, manufacturing, health care, telecommunications, and financial services. His recent experiences include:

  • Currently representing AT&T in its proposed $85 billion acquisition of Time Warner.
  • Defended Humana in litigation brought by the U.S. Department of Justice to enjoin its $37 billion acquisition by Aetna.
  • Represented a major telecommunications firm in connection with an investigation by the Department of Justice into alleged violations of Section I of the Sherman Act.
  • Asserted claims on behalf of a global technology company in price-fixing litigation and international arbitration brought against manufacturers of cathode ray tubes.
  • Represented a global energy company in a U.S. Department of Justice investigation relating to $2.5 billion merger.
  • Represented a multi-national chemical company in an internal investigation and response to federal grand jury subpoena for alleged price-fixing and bid-rigging.

Marty served as a contributing editor to the ABA Section of Antitrust Law’s Antitrust Law Developments (Seventh).

Marty maintains an active pro bono practice. He currently is representing a former prison inmate in a Section 1983 civil rights action.

Marty earned his J.D., cum laude, from Boston College Law School and his B.A., magna cum laude, in political science from Loyola University Chicago. While in law school, Marty successfully briefed and argued an armed robbery case before the Massachusetts Appeals Court, working in conjunction with the local District Attorney’s Office.


Admitted to practice: District of Columbia, Massachusetts, Ohio (inactive); U.S. Court of Appeals for the Sixth Circuit; U.S. District Court for the Northern District of Ohio; U.S. District Court for the Southern District of Ohio


  • American Bar Association
    • Antitrust Section
    • Young Lawyers Division