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William B. O'Reilly

Phone: +1 202.624.2820
1001 Pennsylvania Avenue NW
Washington, DC 20004-2595

William B. O’Reilly is an associate in Crowell & Moring’s Washington, D.C. office, where he is a member of the firm’s Government Contracts Group.

Liam assists clients with all phases of government contracting, including contract formation and award controversies, performance counseling, and claims and disputes litigation. His practice includes representing clients in bid protests before the Government Accountability Office and U.S. Court of Federal Claims. Liam also regularly advises clients on supply chain risk management, addressing issues such as cybersecurity, country of origin and domestic preferences, and counterfeit part detection and avoidance, as well as conducting internal investigations and mandatory disclosures for performance breaches and potential violations of the False Claims Act (FCA).

Representative Matters:

Bid Protests and Award Controversies

  • Obtained corrective action for disappointed offeror whose proposal was rejected as untimely after agency failed to properly disseminate the solicitation, resulting in extension of the proposal deadline that allowed client to timely resubmit their proposal.
  • Intervened on behalf of awardee in protest before GAO, resulting in protester’s voluntary withdrawal of the protest and preservation of client’s award.
  • Filed protest for a small business specializing in information technology at the Court of Federal Claims, resulting in favorable corrective action.
  • Represented client in bid protest appeal to U.S. Court of Appeals for the Federal Circuit.

Counseling and Investigations

  • Advised colocation services provider on compliance with federal information security safeguards, including DFARS 252.204-7012 and National Institutes for Standards and Technology (NIST) Special Publication (SP) 800-171.
  • Counseled client regarding country of origin determinations for products manufactured from foreign materials for compliance with Trade Agreements Act (TAA), Buy America Act (BAA), and Federal Transit Administration (FTA) covered procurements.
  • Conducted investigation into alleged misrepresentations regarding country of origin of light-emitting diodes (LED) subject to BAA preferences.
  • Drafted policy guidance for manufacturing clients to assist with country of origin and domestic preference compliance.

Liam also maintains an active pro bono practice, where he focuses on assisting veterans in the appeals process for obtaining proper benefits.

Liam received his J.D. cum laude from the Georgetown University Law Center, where he served as an executive articles editor for the school’s flagship law review, The Georgetown Law Journal, and was an active member of the Barristers’ Council’s Moot Court team. During law school, Liam interned in the general counsel’s office of a Fortune 100 aerospace and defense contractor, as well as on the U.S. Senate Judiciary Committee.


  • University of Maryland, College Park, B.A. (2010)
  • Georgetown University Law Center, J.D. (2015) cum laude


Admitted to practice: New York, District of Columbia, U.S. Court of Appeals for the Federal Circuit

View More

"American Rescue Plan Presents New Government Contracting Opportunities – What Prospective Contractors Should Know," Government Contracts Bullet Points (March 19, 2021). Contacts: Gail D. Zirkelbach, Peter Eyre, William B. O'Reilly, Zachary Schroeder
Client Alert / Newsletter
"One-Two Punch: President Biden Issues Made in America Executive Order Mere Days After FAR Council Issues Final Rule Tightening Federal "Buy American" Requirements," Government Contracts Bullet Points (January 29, 2021). Contacts: Alan W. H. Gourley, Adelicia R. Cliffe, Eric M. Ransom, William B. O'Reilly
Client Alert / Newsletter
"GAO Sustains Protests Alleging Agency Failed to Consider Pandemic Impacts on its Requirements," Government Contracts Bullet Points (October 28, 2020). Contacts: Anuj Vohra, Eric M. Ransom, Abigail (Abi) Stokes, William B. O'Reilly
Client Alert / Newsletter
"The Basics of Commercial Item Contracting and the GSA FSS Contract," Government Contracts "101" - Back to Basics Webinar (September 24, 2020). Presenters: Adelicia R. Cliffe, J. Chris Haile, Rina M. Gashaw, and William B. O'Reilly.
"Made of Steel – New Buy American Act Rules Change Analysis and Increase Barriers to Offers of Foreign Manufactured End Products and Construction Material, Particularly for Iron or Steel Products," Government Contracts Bullet Points (September 14, 2020). Contacts: Alan W. H. Gourley, Adelicia R. Cliffe, William B. O'Reilly
Client Alert / Newsletter
"GAO Issues Rare Sustain of a Corrective Action Protest," Government Contracts Bullet Points (August 17, 2020). Contacts: John E. McCarthy Jr., Christian N. Curran, Rina M. Gashaw, William B. O'Reilly
Client Alert / Newsletter
"President Issues Executive Order Addressing Use of Foreign Labor in Federal Contracting and Hiring," Government Contracts Bullet Points (August 5, 2020). Contacts: Trina Fairley Barlow, Peter Eyre, Kris D. Meade, Christine B. Hawes, William B. O'Reilly
Client Alert / Newsletter
"GAO Clarifies Timeliness of Preaward Protests Challenging Solicitation Amendments," Government Contracts Bullet Points (July 1, 2020). Contacts: Amy Laderberg O'Sullivan, William B. O'Reilly, Zachary Schroeder
Client Alert / Newsletter
"All Things Protest: Watch Out for Waiver (June 2020)," Podcast: All Things Protest (June 29, 2020). Contacts: Christian N. Curran, Robert J. Sneckenberg, William B. O'Reilly
Client Alert / Newsletter
"Federal Government Invites Comment on Domestically Nonavailable Articles," Government Contracts Bullet Points (May 14, 2020). Contacts: Alan W. H. Gourley, Adelicia R. Cliffe, William B. O'Reilly
Client Alert / Newsletter

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Crowell & Moring LLP is an international law firm with approximately 550 lawyers representing clients in litigation and arbitration, regulatory and policy, and transactional matters. The firm is internationally recognized for its representation of Fortune 500 companies in high-stakes litigation, as well as its ongoing commitment to pro bono service and diversity, equity and inclusion. The firm has offices in Brussels, Doha, London, Los Angeles, New York, Orange County, San Francisco, Shanghai, and Washington, D.C.

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