main menu

Walter Mack


Walter Mack has extensive civil and criminal litigation, investigative and regulatory experience in and out of the government. From 1993-1995, he served as Deputy Police Commissioner of New York City for Internal Affairs, where he was in charge of all police investigations of police corruption and brutality and instituted new policies to combat these problems. Prior to that, Mr. Mack was an Assistant United States Attorney for the Southern District of New York, Deputy Chief of the Criminal Division, Chief of the Organized Crime Unit and Senior Litigation Counsel within that office. In that capacity he personally investigated and prosecuted at trial a number of complex and significant cases brought in the Southern District of New York. Mr. Mack served as a military police supervisor and a rifle company commander in Vietnam. He also has frequently worked with civil rights organizations, such as the Civilian Complaint Review Board in New York City, during nineteen years serving in or working with government agencies. He served as senior vice-president and associate general counsel at Shearson Lehman, where he supervised and worked with management on securities and employment matters as well as compliance investigations.


J.D., Columbia Law School, 1971
B.A., Harvard University, 1965

Bar Admissions

New York, First Department
U.S. District Court Southern District of New York
U.S. District Court Eastern District of New York
Second Circuit, Court of Appeals

Professional Associations and Memberships

  • American Bar Association
  • New York State Bar Association
  • The Association of the Bar of the City of New York
  • New York County Lawyers Association

Past Employment Positions

  • Internal Affairs Bureau, Deputy Commissioner of Police, New York City Police Department, 1993 – 1995
  • Shearson-Lehman Brothers, Senior Vice-President and Associate General Counsel, 1990 – 1993
  • Strike Force Against Organized Crime, Southern District of New York, Chief, 1981 – 1984
  • U.S. Attorneys Office, Southern District of New York, Deputy Chief, Criminal Division, 1980 – 1981
  • Southern District of New York, Assistant United States Attorney, 1974 – 1990
  • Rogers & Wells, Litigation Department, Associate, 1971 – 1974
  • United States Marine Corps, Captain, 1965 – 1968