Helen Cantwell

Debevoise & Plimpton LLP 

Helen V. Cantwell is a litigation partner with extensive trial experience. Her practice focuses on white collar criminal defense, regulatory enforcement actions and internal investigations for a wide variety of corporations and financial institutions. In addition to advising clients on their responses to state and federal investigations, she also advises these clients on their compliance obligations.

Ms. Cantwell also has deep experience in conducting sensitive investigations involving allegations of sexual misconduct and sexual harassment, dating back to her service as a prosecutor in the Manhattan DA’s Sex Crimes Unit.

Chambers USA (2018) recognizes Ms. Cantwell as a leading practitioner in white collar criminal defense and investigations matters. She is described as “incredibly bright and sharp” by fellow practitioners, who praise her ability to “get up to speed lightning fast.” Clients note that Ms. Cantwell is a “very confident advocate” and commend her “standout judgment and attention to detail.”

Prior to joining the firm, Ms. Cantwell served for eight years as an Assistant United States Attorney for the Southern District of New York. During her tenure in the U.S. Attorney’s Office, she was a member of the Securities and Commodities Fraud Task Force and worked closely with the Securities and Exchange Commission, the Commodities Futures Trading Commission and other law enforcement and regulatory agencies.

Ms. Cantwell joined the U.S. Attorney’s Office in 2000, after four years as an Assistant District Attorney in the New York County District Attorney’s Office. She is a recipient of the Department of Justice Director’s Award for Superior Performance as a Federal Prosecutor.

After the Manhattan District Attorney’s Office, Ms. Cantwell spent a year working in Malaysia with the International Women’s Rights Action Watch, under a fellowship grant from the Henry Luce Foundation.

Ms. Cantwell joined Debevoise in 2008. She earned her J.D. cum laude in 1995 from Harvard Law School, where she was President of the Harvard Legal Aid Bureau, and her B.A. magna cum laudefrom Wellesley College in 1992.


  • White Collar & Regulatory
    • Toyota Motor Sales USA in various state and federal investigations relating to vehicle acceleration issues. These included 29 state attorney general investigations, congressional inquiries, SEC investigations, and Department of Justice (DOJ) investigations, all of which settled without any criminal convictions for the company.
    • A leading fintech company in multiple matters, including the successful resolution of an anti-money laundering investigation by the DOJ.
    • A top national bank in an investigation into allegations of money laundering.
    • A top national bank in an investigation by the DOJ into mortgage-related matters.
    • An individual in connection with an insider trading investigation.
    • A global insurer in inquiries conducted by the NY Department of Financial Services and NY Attorney General relating to alleged unlicensed sales of life insurance in New York.
    • A leading consulting firm in allegations investigated by the DOJ, which resulted in the exoneration of the firm.
    • Various bank executives in investigations related to LIBOR and other potential securities fraud by the SEC, CFTC and DOJ.
    • The Chief Risk Officer of a hedge fund in civil litigation and investigations relating to the Bernard L. Madoff matter.
    • Private equity clients in governmental investigations and litigations relating to fallout from the financial crisis and the collapse of MF Global.
    • Ongoing compliance advice to clients regarding the Foreign Corrupt Practices Act, various banking regulators, and anti-money laundering.
    • Current and former corporate executives in DOJ, SEC and CFTC investigations involving allegations of securities fraud, theft of trade secrets and other matters.
  • Sensitive Investigations
    • The Board of Directors of CBS Corporation in an investigation of sexual harassment allegations against the CEO, senior CBS News personnel, as well as allegations about the corporate culture.
    • The Board of the Cleveland Orchestra in an independent investigation of allegations of sexual misconduct by two musicians.
    • Syracuse University in responding to inquiries by various law enforcement authorities which arose as a result of allegations of sexual abuse made against former Associate Head Coach of the University’s men’s basketball team. We are also representing the University in a defamation case that was filed against the University and its head basketball coach, the dismissal of which was affirmed by New York’s intermediate appellate court and is now before the New York Court of Appeals.
    • The National Football League in an investigation into allegation of workplace misconduct involving a team owner.
    • Save the Children, an international NGO, in an investigation of alleged improper conduct by a past employee.
    • Multiple secondary schools in such investigations, including The Ramaz School, The Potomac School, and The Laurel School, among others.
  • Civil & Trial
    • A leading international life insurance company in successful settlement of securities litigation arising from its demutualization.
    • Metromedia International Group in a trial in Delaware Chancery Court (In re Appraisal of Metromedia).


  • Harvard Law School, 1995, J.D.
  • Wellesley College, 1992, B.A.

Bar Admissions:

  • New York


Rate : $$$

What types of cases Attorney Helen Cantwell & Debevoise & Plimpton LLP  can handle?
Debevoise & Plimpton LLP  can handle cases related to laws concerning Litigation, White Collar Crime, International Law. We manually verify each attorney’s practice areas before approving their profiles and reviews on our website.
Where is Debevoise & Plimpton LLP  located?
Debevoise & Plimpton LLP  is located at 919 Third Avenue, New York, NY 10022, USA. You can reach out to Debevoise & Plimpton LLP  using their phone line 212 909 6312. You can also check their website debevoise.com or email them at [email protected].
How much would it cost to hire Debevoise & Plimpton LLP ?
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Debevoise & Plimpton LLP 
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