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Tatiana R. Martins


Tatiana R. Martins

White Collar Defense & Investigations
New York

Deep experience in criminal and regulatory enforcement matters and conducts internal investigations. Former Chief of SDNY Public Corruption Unit.

Tatiana represents boards, companies and individuals in white collar defense and regulatory enforcement matters and conducts internal investigations involving bribery, money laundering, financial frauds, criminal antitrust and workplace misconduct. She also advises companies and boards on governance and compliance.

An experienced trial lawyer, Tatiana has tried multiple cases to jury verdict. As an Assistant U.S. Attorney for the SDNY, she tried high-profile cases including that of former N.Y.S. Assembly Speaker Sheldon Silver. As Chief of the SDNY Public Corruption Unit, she oversaw major cases against Michael D. Cohen, NCAA basketball coaches and high-level U.N. officials.

Tatiana is recognized by Chambers USA, where sources say she is “phenomenal” and “has excellent judgment.” She is a native Portuguese speaker and is fluent in Spanish.

Tatiana is on the boards of the Office of the Appellate Defender and the Tinker Foundation. She is also an adjunct professor at Columbia Law School.

Experience highlights

  • Lead counsel to Grupo Aval and its subsidiary Corficolombiana in securing a coordinated resolution of FCPA investigations by the DOJ and SEC
  • Secured rare dismissal of criminal indictment against individual client in a criminal price-fixing case
  • Secured declination for broker-dealer affiliate of a Brazilian bank in FINRA investigation
  • Representing a global financial institution in matters involving Mexico, Ecuador and Brazil
  • Representing a financial services institution in multiple civil and regulatory matters related to FTX 
  • Has represented large multinational corporations in connection with DOJ and SEC investigations of bribery-related allegations in Latin America, Europe and Asia, including Siemens AG 
  • Led an internal investigation at a multi-lateral development bank into allegations of misconduct by the president of the bank in connection with an inappropriate relationship with a bank employee
  • Conducted numerous internal investigations in the areas of anti-corruption, financial frauds and money laundering, including in U.S., Brazil, Colombia, Peru, Mexico and Serbia
  • Secured a declination from the DOJ’s Antitrust Division for a multi-national corporate client in a no-poach criminal antitrust investigation
  • Assisted clients in evaluating and developing compliance policies, procedures, strategies and trainings to mitigate risk
View more experience


SEC & CFTC Enforcement Update



Chambers USA – White-Collar Crime & Government Investigations, New York

Chambers USA – FCPA

Benchmark Litigation – United States and New York, Star

Crain’s New York Business – “Notable Women in Law,” 2023

Expert Guide – White Collar Crime, United States, 2021

Latinvex – “Latin America’s Top 100 Female Lawyers,” 2021-2023

Member of Law360’s 2024 Trials Editorial Advisory Board

Lawdragon – 500 Leading Litigators in America, 2024


J.D., Yale Law School
  • Editor, Yale Journal of Law & the Humanities
B.A., UC Berkeley
  • summa cum laude
  • Phi Beta Kappa


Law Clerk, Hon. Denise Cote, U.S. District Court, S.D. New York, 2003-2004

Professional history

  • Davis Polk, 2005-2009, 2010-2012 and 2018-present
  • Assistant U.S. Attorney, Southern District of New York, 2012-2018
    • Chief, Public Corruption Unit, 2017-2018
    • Deputy Chief, Public Corruption Unit, 2016-2017

Qualifications and admissions

  • State of New York
  • U.S. Court of Appeals, Second Circuit
  • U.S. District Court, Colorado
  • U.S. District Court, S.D. New York
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