Lynne provides her clients with practical, results-oriented legal advice that helps them manage legal, compliance, and enforcement risks. She guides clients through all aspects of government compliance, and provides trusted, steady counsel during complex internal and governmental investigations, audits, and whistleblower retaliation claims. She also represents clients in high-stakes suspension and debarment proceedings.

Her philosophy, informed by government, industry, and law firm experience, is that understanding a client’s culture and risk tolerance is vital to formulating legal advice that is practical and cost-effective.

Lynne’s leadership roles, including having served as the Deputy Sergeant at Arms at the U.S. Senate and the Acting Inspector General at the Department of Defense, inform her approach to counseling executives and boards facing difficult business, legal, and ethical decisions because of a whistleblower allegation, government investigation, or suspension and debarment matter.

Lynne helps organizations and individuals respond to government inquiries involving the False Claims Act, procurement/grant fraud, procurement integrity, and ethics issues. Additionally, Lynne helps clients respond to government subpoenas and requests for information and navigate the decision on whether to make a disclosure to the government. As an experienced ethics and compliance lawyer, she has been selected to serve as an independent monitor and has helped organizations develop effective, sustainable, and tailored ethics and compliance programs.

Before Cassidy Law, Lynne worked as the Chief Compliance Officer and Deputy General Counsel at Acuity International and was a partner at Holland & Knight and Nichols Liu LLP. Her other government service includes over a decade at the Department of Justice, including as an Assistant United States Attorney, and supporting the Special Inspector General for Iraq Reconstruction as its General Counsel.

She is a chapter co-author of the ABA-published book, The False Claims Act and Government Contracts, The Enforcement Community, 2022, and a vice-chair of the Public Contract Law Section’s Procurement Fraud and False Claims Act Committee. Throughout her career she has written and spoken extensively on federal contract and grant compliance and enforcement issues.

Lynne serves on the boards of Northern Virginia Family Services and the National Center for State Courts.

Entering the federal marketplace or seeking to grow globally? Lynne Halbrooks can help develop practical compliance strategies, respond effectively to government inquiries, and build a culture of integrity that earns trust for your organization.