John has a wealth of experience in antitrust law through his current practice, including the following:

• Serves as antitrust counsel to a multi-specialty health care provider
• Counsels various health care, manufacturing and other clients on antitrust issues arising in operational and transactional contexts
• Represents manufacturing and other clients in responding to investigations, subpeonas and document requests from federal and state antitrust enforcement authorities, as well as from private parties engaged in civil antitrust litigation
• Represented Massachusetts health care systems as acquiring or acquired entities in their Hart-Scott-Rodino (HSR) premerger filings and other antitrust issues
• Successfully defended a health care system in antitrust suit in federal court in Massachusetts, obtaining dismissal of the case before discovery
• Reviews and revises antitrust compliance policies for a variety of clients, and provides antitrust compliance training as requested

Prior to re-entering private practice, John worked in the U.S. Department of Justice, Antitrust Division from 1995 to 1997 and again from 2009 to 2014. In the New York Field Office in New York, New York, John investigated and prosecuted white collar criminal violations of antitrust and related laws. During this time, he successfully tried and convicted hospital facilities executives and bankers from a Fortune 500 bank. As a member of the Merger Task Force in Washington, D.C., John investigated and challenged potentially anticompetitive mergers in a variety of industries. Before his government service, John was a senior associate at a large law firm in Boston and as such defended five liberal arts colleges subject to DOJ antitrust investigation for alleged anticompetitive conduct in setting tuition, financial aid and faculty salary levels.

In 2017, John was a speaker and organizer of the Boston Bar Association CLE program,"Antitrust in Healthcare: Foundations, Operations, Transactions." He is a regular guest lecturer on "Antitrust 101 for Healthcare Lawyers" for both the Boston University Law School course on Health Care Transactions and the Maine Law and Public Policy course on Health Care Law and Ethics.

John is a member of the American Bar Association Section of Antitrust Law and the American Health Lawyers Association.