Britt Mosman is a partner in and Co-Chair of the Global Trade & Investment Practice Group in Washington, who advises clients on a wide range of international transactional, compliance, and enforcement issues. Her experience includes advising global financial institutions and leading multinational companies on economic sanctions, Bank Secrecy Act (BSA) / anti-money laundering (AML), and export controls laws, as well as transaction reviews by the Committee on Foreign Investment in the United States (CFIUS) and other national security-related issues. In addition, as part of the Willkie Digital Works team, Britt routinely advises crypto sector participants on how to comply with BSA/AML and economic sanctions requirements.
Britt has deep experience with economic sanctions laws and regulations, having served as an Attorney-Advisor in the Office of the Chief Counsel (Foreign Assets Control) advising the Treasury Department’s Office of Foreign Assets Control (OFAC), prior to joining Willkie. In this capacity, she focused on economic sanctions and national security issues, including as a lead attorney on the Iran, Ukraine/Russia, Cuba, Syria, Election Interference, and Cyber-related sanctions programs.
Her experience includes:
- Guiding major domestic and foreign companies in preparing voluntary self-disclosures, responding to subpoenas and conducting internal investigations in high-stakes civil and criminal enforcement proceedings by federal and state agencies involving potential violations of sanctions and BSA/AML laws.
- Counseling clients on the full range of sanctions, BSA/AML, and export controls policy and compliance issues.
- Assisting clients in developing and maintaining sanctions, anti-money laundering, and export controls compliance policies and procedures.
- Representing lenders, underwriters, borrowers, issuers, and companies in international lending, capital markets, and M&A transactions regarding sanctions and anti-money laundering issues.
- Working with clients in national security reviews at all phases of the transaction life cycle, including conducting CFIUS risk analyses and navigating the CFIUS process through preparation of notices, discussions with CFIUS member agencies, advising on follow-on investigations, and negotiating and implementing mitigation agreements.
- Advising clients on inward and outward foreign investment transactions, particularly transactions that involve the Defense Security and Counterintelligence Agency (DCSA) evaluation of Foreign Ownership, Control or Influence (FOCI), including through Special Security Agreements, Security Control Agreements, Voting Trust Agreements, Proxy Agreements, and Board Resolutions.
- Assisting crypto sector participants in registering as a Money Services Business with the Financial Crimes Enforcement Network (FinCEN), complying with state-level money transmitter laws and other cryptocurrency specific laws (such as the NY Bitlicense), and implementing AML policies and procedures.
- Advising financial institution and crypto sector clients on BSA/AML-related considerations, such as customer identification program / know your customer / customer due diligence requirements and suspicious activity reporting requirements.
- Counseling clients on the full range of sanctions, BSA/AML, and export controls compliance issues.
Experience
Britt has deep experience with economic sanctions laws and regulations, having served as an Attorney-Advisor in the Office of the Chief Counsel (Foreign Assets Control) advising the Treasury Department’s Office of Foreign Assets Control (OFAC), prior to joining Willkie. In this capacity, she focused on economic sanctions and national security issues, including as a lead attorney on the Iran, Ukraine/Russia, Cuba, Syria, Election Interference, and Cyber-related sanctions programs. In addition to sanctions, Britt has several years’ experience advising clients on U.S. AML laws and regulations and representing clients navigating the CFIUS process.
- Chambers Global (2025) – International Trade: Export Controls & Economic Sanctions
- Chambers USA – recognized among the leading individuals in the United States practicing in the areas of International Trade: Export Controls & Economic Sanctions (2024-2025) and International Trade: CFIUS Experts (2025)
- Named "Top Advisors 2024" by Foreign Investment Watch (2023-2025)
- Named to D.C. Courts 2023 Capital Pro Bono Honor Roll (High Honors)
- Named “Top Advisors 2023” by Foreign Investment Watch (2023)
- Named to “2022 South Trailblazers” by The American Lawyer (2022)
- U.S. Treasury Department, Office of Terrorism and Financial Intelligence, “Top Team” award (FY 2020)
- U.S. Treasury Department, Office of General Counsel, Individual Special Act award (August 2020) and Outstanding Performance award (FY 2019)
- Member of team recognized for following awards: Restructuring Deal of the Year (+$5B-$10B), The M&A Advisor, Turnaround Awards (2017); Corporate Turnaround of the Year (+$5B), Turnaround Atlas Awards (2017); Transatlantic Tax Team of the Year, American Lawyer, Transatlantic Legal Awards (2017)
- Member of the Editorial Board of Law360 (2025)
- Member of the Editorial Board of the Global Trade Law Journal
- Britt has served as a member of the Awards/Subgrants Team, Young Lawyers Division, American Bar Association (2017-2018)
- Member of Willkie Women’s Professional Development and Associate Professional Development Committees
Britt plays an active role as a thought leader shaping the ongoing policy conversation around international trade and national security issues.
Selected speaking engagements include:
- Speaker, "Sanctions Policy and Enforcement: What to Expect Under the Trump Administration," American Conference Institute Webinar (February 2025)
- Speaker, "Navigating the Intersection of AML and Sanctions," 18th Annual Flagship Conference on Economic Sanctions Enforcement and Compliance (April 2024)
- Speaker, Transform Finance FinCrime & Cybersecurity Summit (April 2024)
- Speaker, "National Security, Sanctions, and Export Controls," Sandpiper Partners (October 2023)
- Speaker, “The GIR Insight Sanctions Roundtable,” Global Investigations Review (April 2023)
- Speaker, “Insuring Digital Assets and Digitalizing Your Business: New AML & Sanctions Compliance Challenges,” American Conference Institute AML&OFAC for the Insurance Industry Conference (January 2022)
- Speaker, “What’s Putin Planning? Implications for Energy and Order,” Ergo Flashpoints Forum Briefing chaired by former White House National Security Advisor H.R. McMaster, (January 2022)
- Speaker, “Russia Attacks Ukraine,” Ergo Rapid Response Briefing (February 2022)
- Speaker, “Russia-Ukraine Implications – The Next 90 Days,” Ergo Flashpoints Forum Briefing (March 2022)
- Speaker, “Sanctions Against Russia,” Willkie Compliance Concourse Podcast Discussion (March 2022)
- Speaker, ACI’s AML & OFAC Compliance for the Insurance Industry event, (January 2022)
- Speaker, “Tensions on the Russia/Ukraine Border – How We Got Here and What’s Next,” Willkie Compliance Concourse Podcast Discussion (January 2022)
- Speaker, “Sanctions and Supply Chain Risks,” Global Investigations Review, Women in Investigations Conference (September 2021)
- Speaker, “New York Department of Financial Services Part 504 Compliance,” Lorman Education Services (April 2018)
Selected publications include:
- "Alabama Federal Judge Declares Corporate Transparency Act Unconstitutional: Issues Permanent Injunction Against Enforcing It Against Plaintiffs," Client Alert (March 2024)
- "The Corporate Transparency Act: What’s New for the Insurance Industry," Client Alert (February 2024)
- "Are You Ready to Report? Here’s What Non-U.S. Investment Advisers Need to Know about the Corporate Transparency Act," Client Alert (February 2024)
- "Third Time’s a Charm: FinCEN Proposes AML Rule for Investment Advisers," Client Alert (February 2024)
- "Biden Signs Sanctions Order Responding to Violence in the West Bank," Client Alert (February 2024)
- "Sanctions: The US Perspective," Global Investigations Review (January 2024)
- "New Russia Sanctions: A Warning to Non-U.S. Banks," Client Alert (January 2024)
- "Sanctions and Export Controls Voluntary Disclosures: Key Takeaways from Federal Tri-Seal Compliance Note," Global Law Trade Journal (January 2024)
- "Are You Ready to Report? Here’s What You Need to Know about the Corporate Transparency Act," Client Alert (December 2023)
- "U.S. Expands Year-Old Semiconductor Export Controls, With Additional Controls on the Way," Client Alert (November 2023)
- "New Opportunities in Venezuela? Key Takeaways from OFAC’s October 2023 General Licenses," Client Alert (November 2023)
- "The Guide to Anti-Money Laundering, Challenges for Global Financial Institutions under Conflicting Legal Regimes" (September 2023)
- “FinCEN Publishes First of Three Proposed Rules on Beneficial Ownership Reporting Requirements,” Investment Lawyer (April 2022)
- “The Practitioner’s Guide to Global Investigations: Sanctions: The US Perspective,” Global Investigations Review (January 2022)
- “The Guide to Sanctions: US Sanctions Enforcement by OFAC and the DOJ,” Global Investigation Review (July 2021)
- "Reputational Concerns Mount as US Companies Reconsider Russia,” Bloomberg Law (June 15, 2022)
- “Crypto’s secret threat to modern warfare: diminishing the power of economic sanctions,” The Globe and Mail (February 2022)
Credentials
Education
Boston College Law School, J.D., 2010 Brigham Young University, B.A., 2004