Tirzah Lollar is co-chair of the firm's False Claims Act practice, where she concentrates on white collar defense, internal and government investigations, as well as trial work. She has defended clients operating across a variety of industries and geographic regions in government investigations and other proceedings related to the False Claims Act, government contracts and procurement fraud, the Foreign Corrupt Practices Act, and similar global anti-corruption legislation, tax fraud, and antitrust offenses.

She regularly represents clients before relevant enforcement authorities and has successfully litigated numerous cases. Ms. Lollar also provides compliance counseling, helping clients assess and address anti-corruption and other risks by leading internal compliance investigations and regulatory due diligence related to acquisitions and business relationships, as well as conducting risk assessments and implementing compliance programs.


  • Five Healthcare Providers in Texas and Louisiana in a case brought under the federal, Texas, and Louisiana FCA statutes filed by a relator and the State of Texas relating to Texas and Louisiana’s efforts to terminate the providers from participating in their respective Medicaid programs where Plaintiffs seek over $1 billion in damages and penalties.
  • (Fed. Cl.) – Defended a government contractor in a $1.4 billion fraud trial against the United States that resulted in judgment for the government contractor on all but one claim, which resulted in a low value negotiated settlement.
  • (E.D. Va.); (Fourth Circuit, U.S. Supreme Court) – Defended a government contractor in qui tam action in which, after dismissal by trial court and reversal by circuit court, the Supreme Court ruled 9-0 in favor of contractor that Wartime Suspension of Limitations Act does not suspend statute of limitation for civil fraud actions, including those brought under the False Claims Act.
  • (D.C. Cir.); (D.D.C.) – Represented a government contractor in qui tam action and successfully obtained two writs of mandamus vindicating the contractor's claim of attorney-client privilege over materials created during an internal investigation led by company lawyers; subsequently won summary judgment on all counts.
  • (E.D. Mich.) – Defended government contractor in False Claims Act case brought by the government alleging violations of Truth in Negotiations Act in price negotiations and claiming damages of potentially upwards of $400 million that resulted in a cost of litigation settlement.
  • (S.D. Tex.) – Represented an individual in a large mortgage FCA case brought by DOJ in which the individual was charged with violating FIRREA by making false statements and certifications to the Department of Housing and Urban Development.
  • (S.D. Tex.); (Fifth Circuit) – Defended a global supplier of telecommunications products in qui tam action regarding its provision of services to schools and libraries under the federal E-Rate program; although the district court denied a motion to dismiss, the Fifth Circuit reversed and held on an issue of first impression that funds from the E-Rate program are not "provided by" the United States for purposes of the False Claims Act.
  • (E.D. Va.); (Fourth Circuit) – Obtained dismissal of qui tam against a government contractor on grounds that alleged contractual deficiencies alone do not create False Claims Act liability; the Fourth Circuit affirmed the dismissal in a published opinion that has been cited in countless False Claims Act cases since.
  • (C.D. Ill.) – Successfully defended a government contractor in qui tam action where a relator sought more than $600 million in damages and penalties; relator voluntarily dismissed the suit after defense team won a parallel contract interpretation suit against the Army in which the Army adopted the contractor's interpretation of the contract, which preempted relator's claims.
  • (E.D. Va.) – Persuaded government not to intervene in qui tam suit against government contractor regarding the provision of cleared personnel in Afghanistan; after the government declined to intervene, relators dismissed the case.
  • (E.D. Va.) – Defended a global supplier of communications and security products in qui tam action regarding its dealings with a government customer that resulted in favorable settlement at a small fraction of the United States' original damages claim.
  • (D.C. Cir.); (D.D.C.) – Won summary judgment in non-intervened qui tam regarding morale, welfare, and recreation services; affirmed on appeal in first post-Escobar case in DC Circuit.
  • (D.D.C.) – After meetings and written advocacy, persuaded the government not to intervene in this qui tam suit regarding the handling of government property during the war in Iraq; after the government declined to intervene, the relator dismissed the case.
  • (D.Colo.) – Represented oil and gas company in government investigation of allegations of False Claims Act violations based on natural gas royalty accounting and reporting.


Kick Off the New Year with Qui Notes False Claims Act FY2022 Year in Review and an Early Look at FY2023
Arnold & Porter Webinar
Deskbook on Internal Investigations, Corporate Compliance, and White Collar Issues (2nd ed.)
Practising Law Institute
Arnold & Porter Discusses DOJ’s First False Claims Act Settlement With PPP Lender
The CLS Blue Sky Blog
It Was Only a Matter of Time: DOJ Settles First FCA Case with PPP Lender
Qui Notes: Unlocking the False Claims Act
DOJ Announces First False Claims Act Settlement With PPP Lender


Latin Lawyer 250

Anti-Corruption Investigations and Compliance (2019-2022)

Best Lawyers

Criminal Defense: White-Collar (2022-2023)

The Legal 500 US
Corporate Investigations and White-Collar Criminal Defense (2019)
Government Contracts (2019)


  • JD, University of Virginia School of Law, 2004
  • BA, University of Virginia, 1999, with distinction
  • District of Columbia
  • Virginia
  • Supreme Court of the United States
  • US Court of Appeals for the Fourth Circuit
  • US Court of Appeals for the Fifth Circuit
  • US Court of Appeals for the District of Columbia Circuit
  • US District Court, Eastern District of Virginia
  • US District Court, Western District of Virginia
  • US District Court, District of Columbia
  • US District Court, Southern District of Texas
  • US District Court, Central District of Illinois
  • US District Court, Eastern District of Michigan
  • US Court of Federal Claims
Government & Military Service
  • Paralegal Specialist, Criminal Division, Office of International Affairs, US Department of Justice
  • US District Court, Eastern District of Virginia, The Honorable James C. Cacheris
  • Member, Public Contract Law Section, American Bar Association

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