Lynne M. Halbrooks

Lynne M. Halbrooks is a senior attorney at Cassidy Law who advises clients on government compliance, internal investigations, government audits and investigations, government contracting compliance, ethics strategies, and independent monitorships. Lynne helps organizations and individuals manage legal and enforcement risk, respond to subpoenas and information requests, address whistleblower retaliation claims, and navigate high-stakes suspension and debarment matters involving federal contracting and government oversight.

Lynne studied at Marquette University School of Law and earned a BS in Political Science and Philosophy from the University of Minnesota, Duluth. She is admitted to practice in Washington, DC and is inactive in Wisconsin and Minnesota. Her professional background includes government, industry, and law-firm roles, giving her a broad perspective on how legal requirements, business operations, organizational culture, and risk tolerance affect compliance decisions.

Her experience includes responding to government inquiries involving the False Claims Act, procurement and grant fraud, procurement integrity, and ethics issues. Lynne has served as an independent monitor and has helped organizations design compliance programs. Her prior roles include Chief Compliance Officer and Deputy General Counsel at Acuity International, partner positions at major government-contracting firms, more than a decade at the Department of Justice, and service as an Assistant United States Attorney.

Lynne M. Halbrooks has also served as Deputy Sergeant at Arms of the U.S. Senate and Acting Inspector General at the Department of Defense. Lynne writes and speaks on federal contract and grant compliance and enforcement issues and serves in professional and nonprofit leadership roles. Her practice helps executives, boards, contractors, and organizations respond to investigations, evaluate disclosure and compliance questions, and build practical systems for managing government-facing legal risk.

Law Office Affiliations

• Attorney, Cassidy Law PLLC
• Member, District of Columbia Bar
• Member, State Bar of Wisconsin
• Member, Minnesota State Bar Association
• Vice Chair, Public Contract Law Section’s Procurement Fraud and False Claims Act Committee
• Member, Northern Virginia Family Services
• Member, National Center for State Courts

Licensed State

• District of Columbia
• Wisconsin
• Minnesota

Education

• University of Minnesota, Duluth
  Bachelor of Science (BS) in Political Science and Philosophy

Awards & Badges