Pat is a litigator who focuses his practice on complex civil litigation, including False Claims Act and environmental litigation. In addition, he has led internal investigations for major government contractors and has coordinated legal and public relations responses on behalf of clients when their reputations are at stake.

In particular, Pat has extensive experience representing government contractors and health care providers accused of fraud in all phases of cases under the False Claims Act, including cases involving contracts with the Department of Energy and Department of Defense and cases involving alleged Medicare and Medicaid fraud. He has led internal investigations of potential whistleblower complaints, assisted clients in responding to grand jury and state and federal agency subpoenas, negotiated settlements with the Department of Justice, and coordinated litigation in both intervened and non-intervened False Claims Act cases.