Heltzer_G_TGregory E. Heltzer
Washington, D.C. Office
T: +1 202 756 8178

Gregory E. Heltzer 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 Federal Trade Commission, Department of Justice, state antitrust authorities and foreign competition authorities. In addition, his practice also includes complex antitrust litigation, government investigations and antitrust counseling (e.g., advising agricultural cooperatives on the requirements of the Capper Volstead Act). Greg has experience in a variety of industries including: agriculture; chemicals (industrial); consumer electronics; dairy products; defense products (simulation and training); explosives and detonators; foodservice equipment; fire retardants; food products and ingredients; glass production and packaging; health care services; medical devices; pharmaceuticals; software; and steel products. He is admitted to practice in the District of Columbia, the State of Maryland and the U.S. District Court for the District of Columbia.


Hamilton_A_06882_TAndrea L. Hamilton
Brussels, Washington, D.C. Offices
T: +32 2 282 35 15

Andrea L. Hamilton is a partner in the law firm of McDermott Will & Emery LLP based in its Brussels office.  Andrea focuses her practice on EU and international merger control, investigations, and complex antitrust litigation, with significant experience in the defense, life sciences, commodities, chemicals and consumer products industries. Andrea represents clients before the European Commission, European courts and other national competition authorities. She has counseled clients on matters related to distribution practices, cooperation agreements, and other competition and trade-related matters, including economic sanctions.


Daniel Powers
Washington, D.C. Office
T: +1 202 756 8131

Daniel (Dan) Powers focuses his practice on antitrust litigation, counseling and regulatory matters. He assists clients in a variety of industries, including health care, pharmaceuticals, mobile communications, aerospace and defense. Dan advises clients on antitrust issues in connection with pricing and distribution activities, and mergers and acquisitions. He has defended numerous transactions before the US Federal Trade Commission (FTC) and the Department of Justice (DOJ). He also works regularly with clients on matters relating to merger notifications under the Hart-Scott-Rodino Act (HSR).

Henry_D_12098_TDavid Henry

Brussels Office
T: +32 2 282 35 69

David Henry is a practicing UK barrister and senior associate in the international law firm of McDermott Will & Emery, based in its Brussels office. His practice focuses on European competition law including merger control, cartels and abuse of dominance, and the interaction between antitrust and intellectual property. His clients include companies and trade associations in the air transport, chemicals, electronics, medical devices, pharmaceuticals, food retailing and financial services and payment systems sectors. He also advises clients in proceedings before the European courts and national competition authorities.