Photograph of William B. O'Reilly View LinkedIn page Download V-card

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

"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
"GAO Rejects Use of Highest-Technically Rated Reasonably-Priced Award Criteria for FSS Contracts," Government Contracts Bullet Points (January 23, 2020). Contacts: Jonathan M. Baker, Anuj Vohra, Eric M. Ransom, William B. O'Reilly
Client Alert / Newsletter
"GAO Rejects Agency’s Attempt to Award an FSS BPA Under Multiple Schedule Contracts," Government Contracts Bullet Points (January 6, 2020). Contacts: Lorraine M. Campos, William B. O'Reilly
Client Alert / Newsletter

For all Highlights, News & Knowledge, please click here to view desktop bio.

Crowell & Moring LLP is an international law firm with more than 500 lawyers representing clients in litigation and arbitration, regulatory, 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. The firm has offices in Washington, DC, New York, Los Angeles, San Francisco, Orange County, London, and Brussels.

View Desktop Site | Mobile Sitemap

Contact | Subscribe | Terms of Use | Privacy Statement | Alumni

© Crowell & Moring LLP 2020
Attorney advertising - prior results do not guarantee a similar outcome.