Photo of MaryJeanette  Dee

MaryJeanette Dee

New York
T: 212.634.3079
F: 212.655.1730


  • J.D., Harvard Law School, 1990, cum laude
  • B.A., Wells College, summa cum laude
  • New York
  • U.S. District Courts for the Southern and Eastern Districts of New York
Publications & News

MaryJeanette Dee is a partner in the Government Contracts, Investigations and International Trade Practice Group in the firm’s New York office.  She is the Co-Team Leader of the Securities Enforcement Team and a member of the firm’s Executive Committee.

Areas of Practice

Ms. Dee concentrates in internal investigations and regulatory and white collar criminal defense.  Ms. Dee frequently represents banks, broker-dealers, investment advisers, corporate officers, financial advisors and other securities professionals in connection with domestic and cross-border investigations and inquiries by U.S. Attorney’s Offices throughout the country, the SEC, the CFTC, FINRA, the NY Attorney General’s Office and other governmental entities and self-regulatory organizations.  She has conducted numerous internal investigations and responded to criminal and regulatory inquiries involving both recurring and cutting edge securities issues. These include insider trading, alleged Foreign Corrupt Practices Act violations, market access issues, anti-money laundering practices, trading and position valuation and reporting, market manipulation, misuse of confidential information, embezzlement, and retail brokerage sales practice violations.  Representative engagements include:

Institutional representations:

  • Representation of a global investment bank and a U.S. broker-dealer in connection with SEC and FINRA investigations involving the SEC’s Market Access Rule (Rule 15c3-5);
  • Representation of a Korean bank in connection with potential US sanctions violations;
  • Representation of the Private Bank division of a global investment bank in connection with FINRA, SEC and state securities regulatory inquiries and investigations;
  • Representation of the Audit Committee of a non-profit organization in connection with whistleblower allegations of contracting irregularities;
  • Representation of global investment banks and investment advisers in connection with insider trading investigations;
  • Representation of a broker-dealer in connection with a FINRA “marking the close” investigation;
  • Representation of global investment bank in connection with whistleblower allegations of improper marking-to-market of equity derivatives;
  • Representation of a global financial institution in connection with FINRA investigation of its retail securities lending program.

Individual representations:

  • Representation of global bank personnel in connection with SEC FCPA investigation regarding Asia hiring practices;
  • Representation of a financial advisor in connection with money laundering investigation by the U.S. Attorney’s Office for the Southern District of Florida;
  • Representation of traders in connection with ISDAfix investigations by the CFTC;
  • Representation of a financial advisor in connection with a FINRA investigation relating to managed futures products;
  • Representation of a senior AML Risk Officer in FINRA AML practices investigation;
  • Representation of ETF professional in connection with an SEC investigation regarding potential conflicts of interest;
  • Representation of senior mortgage finance professionals in RMBS-related investigations and litigations;
  • Representation of financial advisors in connection with FINRA investigation into CRD disclosures;
  • Representation of a compliance professional in SEC information barriers investigation;
  • Representation of a trader in FINRA investigation relating to alleged kickback scheme;
  • Representation of operations professionals in connection with SEC “soft dollar” investigation;
  • Representation of a retail branch manager in connection with FINRA Ponzi scheme investigation.

In 1993, Ms. Dee served as Special District Attorney in the Middlesex County District Attorney’s Office in Massachusetts. She obtained convictions in bench and jury trials for credit card fraud, aggravated assault, stalking and other felony crimes.

Ms. Dee’s work and professionalism have earned her recognition as a top white collar criminal defense lawyer.  She has been awarded an AV® Rating by Martindale-Hubbell® Peer Review.  In multiple years the Legal 500 directory has recognized her accomplishments in this area.  She has also been named a New York Super Lawyer in white-collar criminal defense and by Best Lawyers in America for White Collar.  She has also served as a Trustee of the Harvard Law School Alumni Association of New Jersey and is a member of a number of professional associations.

  • Best Lawyers in America, 2015-2017
  • Legal 500, 2007, 2008, 2011, 2013, 2016
  • New York Super Lawyers, 2008-2014, 2016
  • AV® Rated, Martindale-Hubbell®


Corporate & Securities Law Blog Posts

Global Trade Law Blog Posts

Investment Management Blog Posts

Speaking Engagements

  • Speaker, “Handling A Regulatory Investigation,” 2016 SIFMA Compliance & Legal Society Annual Seminar, March 13 - 16, 2016
  • Speaker, "Conducting the Investigation," PLI's Internal Investigations 2015, June 2015
  • Speaker, "Handling a Regulatory Investigation," SIFMA Compliance and Legal Annual Seminar, March 2015
  • Speaker, "Concluding the Investigation," PLI's Internal Investigations 2014
  • Speaker, "Internal Investigations," SIFMA Compliance & Legal Society Annual Seminar, 2011-2013
  • Panelist, "Bet the Company Litigation 2010: Best Practices for Complex Cases," PLI Conference
  • Panelist, "Bet the Company Litigation 2009: Best Practices for Complex Cases," PLI Conference
  • Presenter, "Internal Investigations: Balancing Competing Concerns & Objectives"
  • Moderator, "Managing Litigation On Multiple Fronts: Parallel Criminal, SEC, and Plaintiff Proceedings"
  • Moderator, 6th Securities Litigation Conference
  • Panelist, "Overlapping Civil Litigation and Government (Regulatory/Department of Justice) Investigations," PLI Seminar
  • Moderator, "Parallel Criminal, SEC and Plaintiff Proceedings"
  • Speaker, "Interlinking the U.S. and Canada through Overcoming and Managing Multi-Jurisdictional Obstacles"
  • Presenter, "Overlapping Civil Litigation and Government (Regulatory/Department of Justice) Investigations," PLI Seminar