Mary Pat Dwyer


Thank you for your interest. Before you communicate with one of our attorneys, please note: Any comments our attorneys share with you are general information and not legal advice. No attorney-client relationship will exist between you or your business and O’Melveny or any of its attorneys unless conflicts have been cleared, our management has given its approval, and an engagement letter has been signed. Meanwhile, you agree: we have no duty to advise you or provide you with legal assistance; you will not divulge any confidences or send any confidential or sensitive information to our attorneys (we are not in a position to keep it confidential and might be required to convey it to our clients); and, you may not use this contact to attempt to disqualify O’Melveny from representing other clients adverse to you or your business. By clicking "accept" you acknowledge receipt and agree to all of the terms of this paragraph and our Disclaimer.


Mary Pat Dwyer advises clients through government investigations, enforcement actions, and regulatory matters.  Mary Pat has significant experience counseling clients through internal investigations and criminal and civil inquiries from federal regulators.  She regularly assists clients with obtaining clearance from the Committee on Foreign Investment in the United States (CFIUS) for cross-border transactions.   Mary Pat also counsels clients on compliance with international trade laws, including economic sanctions, tariffs, anti-money laundering laws, and export controls.

Mary Pat maintains an active pro bono practice, with a focus on immigration law and policy.  Her recent pro bono work includes obtaining asylum for an unaccompanied child and securing repatriation for a wrongfully deported permanent resident.

Prior to joining O’Melveny, Mary Pat was a law clerk for the Honorable Stanley Marcus of the US Court of Appeals for the Eleventh Circuit and the Honorable Graham C. Mullen, III of the US District Court for the Western District of North Carolina.


Bar Admissions

  • District of Columbia
  • Pennsylvania

Court Admissions

  • US District Court, Eastern District of Pennsylvania


  • Duke University, J.D., summa cum laude; Order of the Coif, 2014
  • University of Notre Dame, B.A., cum laude, Political Science, 2011

Professional Activities


  • Honorable Graham C. Mullen, III, US District Court, Western District of North Carolina
  • Honorable Stanley Marcus, US Court of Appeals, Eleventh Circuit

Alerts and Publications

CFIUS Issues Final Rule Revising the Mandatory Declaration Requirement for Foreign Investments in US Businesses Involved with Critical Technologies

9월 15, 2020

Trump Administration Continues to Target TikTok and Huawei

8월 21, 2020

President Trump Issues Executive Orders Prohibiting Transactions with TikTok and WeChat

8월 9, 2020

CFIUS Proposes Revision to Mandatory Declaration Requirement for Foreign Investments in US Businesses Involved with Critical Technologies

5월 21, 2020

United States Expands Export Controls Targeting Huawei’s Access to US Technology

5월 18, 2020

Treasury Issues Interim Rule for CFIUS Filing Fees

4월 30, 2020

FEMA Temporarily Bans Exports of Scarce or Threatened Personal Protective Equipment

4월 13, 2020

Door Opens to Non-Traditional SBA Lenders’ Participation in SBA’s Paycheck Protection Program

4월 9, 2020

President Trump Orders Chinese Company to Divest Acquisition of US Hotel Software Company

3월 9, 2020

Treasury Issues Proposed Rule for CFIUS Filing Fees

3월 5, 2020

Heads Up: AML and Economic Sanctions Moves the Crypto Industry Should Watch for From Regulators in 2020

2월 25, 2020

Treasury Finalizes New CFIUS Regulations

1월 14, 2020

Department of Justice Revises Guidance on Export Control and Sanctions Enforcement Policy

12월 17, 2019

United States Lifts Sanctions on Turkish Government Ministries and Cabinet Officials

10월 24, 2019

DOJ Lifts the Curtain on Evaluating Claims of “Inability to Pay”

10월 16, 2019

United States Imposes Sanctions on Turkish Government Ministries and Cabinet Officials

10월 15, 2019

Treasury Issues Long-Awaited Proposed CFIUS Regulations

9월 30, 2019

FinCEN SPEAKS CRYPTO: Extensive New Guidance for ICOs, Digital Wallets, DApps, Trading Platforms, Decentralized Exchanges, and others in the Blockchain and Crypto Space

5월 16, 2019

Expansion of US Economic Sanctions Measures on Iran, Venezuela, and Other Jurisdictions Compel Companies Operating Internationally to React Quickly

5월 8, 2019

Federal Regulators Issue Joint Statement Encouraging Banks to Use Innovative Technologies to Combat Money Laundering and Terrorist Financing

12월 5, 2018

CFIUS Update: Interim Regulations, FIRRMA Pilot Program, and Proposed Rulemaking on Emerging Technologies

11월 27, 2018

US Completes Withdrawal from Iran Nuclear Deal with Conclusion of Wind-Down Period, Imposition of New Sanctions

11월 6, 2018


In the News

Press Releases