Geoff Irwin is a trial lawyer who works primarily on complex civil litigation and white-collar criminal investigations. He has particular experience in cases involving allegations of securities fraud, accounting fraud, deceptive trade practices, antitrust violations, Federal Trade Commission Act violations, and environmental remediation. He also has defended a number of consumer class actions. He has tried cases in numerous jurisdictions and has represented individuals and corporations in agency and congressional investigations.

Geoff was part of the winning trial team in Anchor Savings Bank v. United States, which returned one of the largest judgments to date in the long-standing Winstar cases against the federal government at $382 million. He also has played a prominent role in the management and resolution of several securities class actions against issuers and their officers and has handled parallel SEC proceedings as needed. On the antitrust front, Geoff has provided lead litigation support for several high-profile mergers, including the XM-Sirius satellite radio merger and the Miller-Coors joint venture. In addition, he assisted with the successful defense of a major pharmaceutical manufacturer accused of illegally blocking generic drug entry, a trial that resulted in a unanimous defense verdict. Most recently, Geoff supported Chrysler Corporation's emergence from the contested phases of its bankruptcy proceedings.

Geoff is actively involved in pro bono service, having successfully represented a number of criminal defendants in Maryland state courts. He has been quoted in The Washington Post, The New York Times, the Los Angeles Times, and other national media in connection with his cases.