Thomas P. Mazzucco

Thomas P. Mazzucco

580 California Street
Suite 1100
San Francisco, CA 94104

Phone: 415.788.1900
Fax: 415.393.8087

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Primary Practice Areas

White Collar & Regulatory Defense

Civil Litigation


  • All courts in the State of California
  • United States District Courts for the Northern, Central, Eastern, and Southern Districts of California
  • United States Court of Appeals for the Ninth Circuit


  • B.A., Economics, University of California at Berkeley
  • J.D., San Francisco Law School

Thomas P. Mazzucco


Thomas "Tip" Mazzucco has extensive federal and state court trial experience. He has served as counsel in white collar, internal fraud, and federal grand jury matters. Mr. Mazzucco is co-chair of the firm’s White Collar Defense and Investigations group. Mr. Mazzucco served for nine years as an Assistant United States Attorney for the Northern District of California and served ten years as an Assistant District Attorney for the City and County of San Francisco. Prior to entering the public sector, Mr. Mazzucco was an associate at a national civil litigation firm. He specializes in white- collar criminal defense, commercial, corporate and general litigation, claims involving fiduciaries and professionals, grand jury representation, internal corporate investigations, and representations before the Securities and Exchange Commission (SEC).

Mr. Mazzucco has represented and advised political and civic leaders, religious organizations, Wall Street executives, attorneys, judges, college coaches, and professional athletes.

Mr. Mazzucco has also been selected as a Northern California Super Lawyer.

Awards and Honors

  • Expert Guides recently published their White-Collar Crime Expert edition in which Mr. Mazzucco was recognized as an expert in the field.

Highlights and Representative Matters

  • Mr. Mazzucco represents bank executives in an investigation and litigation brought by the United States Department of Justice (DOJ), SEC, and the Office of Comptroller of Currency.
  • Mr. Mazzucco was selected as outside counsel to represent the Federal Deposit Insurance Corporation (FDIC) in investigations and litigation related to bank closures.
  • Represented the Chief Operating Officer / Chief Credit Officer for a large international bank in a five-week long federal criminal trial.
  • Represented an investment banker in a USDOJ and SEC Mortgage-Backed Securities investigation and litigation.
  • Represented clients related to civil and criminal anti-trust matters
  • Represented client in an international political-related money laundering investigation.
  • Represented corporate executives in an international tax investigation by the USDOJ and the Internal Revenue Service’s Criminal Investigation Division (IRS/CID).
  • Representing executives from a major financial service company before the SEC.
  • Provided crisis management representation for a Wall Street executive.
  • Represented a witness in a national security matter.
  • Represented executives in Foreign Corrupt Practices Act (FCPA) investigations and litigation.
  • Represented professional athletes who were victims of financial fraud.
  • Represented the Chief Financial Officer / Treasurer of a major tech company regarding an SEC stock options investigation.
  • Co-counseled the representation of a religious order of nuns related to a Canon Law investigation by The Vatican.
  • Led the review of personnel files, investigation, and public reporting for a religious order of priests regarding credible allegations of sexual abuse.
  • Retained as pool counsel to represent various Fortune 500 corporate executives with common interests in Federal and Regulatory investigations and litigation.

San Francisco Police Commissioner

As a native San Franciscan, Mr. Mazzucco is heavily involved in the community. Commissioner Mazzucco was appointed and served three terms (twelve years) on the San Francisco Police Commission. Commissioner Mazzucco was appointed by Mayors Gavin Newson and Edwin Lee and unanimously confirmed by the San Francisco Board of Supervisors. During his tenure, Commissioner Mazzucco served as the President of the San Francisco Police Commission for four terms.

As a Police Commissioner, Mr. Mazzucco was responsible for setting policies and procedures for the San Francisco Police Department while also supervising the Department of Police Accountability (DPA).

Additionally, Mr. Mazzucco conducted weekly televised meetings and also sat in a quasi-judicial capacity in administrative disciplinary hearings. Mr. Mazzucco has developed an expertise in the investigation and analysis of use of force incidents, in custody deaths, and procedures related to community policing.

Professional and Community Contributions

Mr. Mazzucco is the former Vice President of the San Francisco chapter of the Saint Thomas More Society and is currently a board member for the Little Sisters of Poor, Saint Anne’s Home in San Francisco.

Mr. Mazzucco is a former varsity football player at the University of California at Berkeley and is active in the “Sons of California” football alumni association. He also mentors current UC Berkeley football players regarding their career paths, specifically in law, politics, and law enforcement. Mr. Mazzucco is a member of the University of California at Berkeley Big "C" Society.

Mr. Mazzucco was recently inducted into the Sacred Heart Cathedral Preparatory Athletic Hall of Fame.

Selected Presentations

  • Police Reform and Changing Police Culture - A Conversation With Leadership, Bar Association of San Francisco (BASF), Co-Presented with Norm Stamper, Suzy Loftus, William Scott, Malia Cohen, and Yolanda Jackson, May 15, 2017

Selected Publications

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