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Catherine O. Shames

Phone: +1 202.688.3446
1001 Pennsylvania Avenue NW
Washington, DC 20004-2595

Catherine O. Shames is an associate in the Washington, D.C. office of Crowell & Moring, where she is a member of the firm’s Government Contracts Group. 

Catherine’s government contracts practice focuses on contract claims/disputes under the Contract Disputes Act (CDA), prime-sub disputes, transactional due diligence, internal investigations, and disclosures under the Mandatory Disclosure Rule. She also assists contractors with cost allowability issues and responding to DCAA audits. 

Catherine is active in pro bono matters. She has represented low-income individuals in contested custody disputes and in housing disputes against landlords to remediate unsafe housing conditions.

Catherine received her J.D. and M.B.A. from the College of William & Mary. During law school, Catherine interned for the Honorable Lydia Kay Griggsby at the U.S. Court of Federal Claims. Catherine also completed U.S. Department of Justice internships with the Office of the Pardon Attorney, the Tax Division, the Executive Office for U.S. Attorneys, and the Commercial Litigation Branch, Fraud Section.

Prior to law school, Catherine was a legal analyst at the nation’s largest military shipbuilding company where she gained valuable government contract experience. Catherine holds a Master of Public Policy degree from Duke University and a Bachelor’s degree from Randolph-Macon Woman’s College.


  • Randolph-Macon Woman's College, B.A.
  • Duke University, Sanford School of Public Policy, M.P.P.
  • College of William & Mary, Mason School of Business, M.B.A.
  • College of William & Mary Marshall-Wythe School of Law, J.D.


Admitted to practice: District of Columbia, Virginia, U.S. District Courts for the Eastern and Western Districts of Virginia

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"Accounting, Cost, and Pricing," OOPS 20/20 - Setting Your Sights (October 20, 2020). Presenters: Nicole Owren-Wiest, Skye Mathieson, Catherine O. Shames, and Sean K. Griffin.
"The Virginia Coronavirus Fraud Task Force," Government Contracts Bullet Points (March 25, 2020). Contacts: Gail D. Zirkelbach, Laura J. Mitchell Baker, Catherine O. Shames
Client Alert / Newsletter
"Silence = Acquiescence: Government Stuck with Contractor’s Interpretation that was Provided with its Proposal," Government Contracts Bullet Points (March 18, 2020). Contacts: Nicole Owren-Wiest, Skye Mathieson, Michelle D. Coleman, Catherine O. Shames
Client Alert / Newsletter
"Double Take: The DoD OIG Recommends Attempting to Recoup $43 Million in Purportedly Expressly Unallowable Costs Not Previously Disallowed," Government Contracts Bullet Points (February 13, 2020). Contacts: Stephen J. McBrady, Nicole Owren-Wiest, Skye Mathieson, Michelle D. Coleman, Charles Baek, Catherine O. Shames
Client Alert / Newsletter
"GAO Rejects Navy’s Blind-Eye Approach to Awardee’s Whitewash of Adverse Performance Information," Government Contracts Bullet Points (December 20, 2019). Contacts: Nicole Owren-Wiest, Catherine O. Shames
Client Alert / Newsletter
"Costs and Pricing: No Contract is Really Final," Government Contracts "101" - Back to Basics, McLean, VA (October 23, 2019). Moderator: Mana Lombardo; Panelists: Nicole Owren-Wiest, Charles Baek, and Catherine Shames.
"Expressly Does Not Require Being Expressed: Fed. Circuit Finds Salary Costs for Lobbying are Expressly Unallowable," Government Contracts Bullet Points (October 22, 2019). Contacts: Alan W. H. Gourley, Nicole Owren-Wiest, Catherine O. Shames
Client Alert / Newsletter
"In the Land of the Disfavored: FAR Council Issues Proposed Rule on Avoiding Usage of LPTA," Government Contracts Bullet Points (October 11, 2019). Contacts: Nicole Owren-Wiest, Charles Baek, Catherine O. Shames
Client Alert / Newsletter
"At Last! Proposed Amendments to the FAR Reflecting Increased MPT, SAT and TINA Thresholds," Government Contracts Bullet Points (October 10, 2019). Contacts: Nicole Owren-Wiest, Charles Baek, Catherine O. Shames
Client Alert / Newsletter
"Show Me the Value: DFARS Proposes Rule on Market Research and Value-Based Price Reasonableness Determination," Government Contracts Bullet Points (October 4, 2019). Contacts: Nicole Owren-Wiest, Charles Baek, Catherine O. Shames
Client Alert / Newsletter

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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, Brussels, and Shanghai.

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