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


  • District of Columbia
  • New York
  • U.S. Court of Appeals, Federal Circuit

William B. O'Reilly


William B. O’Reilly is a counsel 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).

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

During law school, Liam 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. He also 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.

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.

Speeches & Presentations


Client Alerts & Newsletters

Firm News & Announcements

January 3, 2022 Crowell & Moring Elects 13 New Partners, Promotes Seven to Senior Counsel, and 19 to Counsel