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Meet Mary E. Galligan

Director, Deloitte & Touche LLP

Mary Galligan is a director in Deloitte & Touche’s Security & Privacy practice. Mary advises senior executives on the crisis management challenges they face, in particular cyber risks. She helps clients develop and execute security programs to prevent and minimize the business impact of cyber threats. This includes board education, cyber war gaming, and other strategy efforts as the public and private sector collaboration around cybersecurity in the US begins to takes shape.

Mary joined Deloitte after retiring in 2013 from a distinguished career with the Federal Bureau of Investigations (FBI). Mary oversaw all FBI investigations into national security and criminal cyber intrusions in New York City, and advised numerous financial institutions, media entities and law firms during their high pressure situations. Her most recent position was with the New York Office as the special agent in charge of cyber and special operations, where she led the largest technical and physical surveillance operation in the FBI.

She gained significant crisis management experience as the supervisor over the FBI's investigation into the terrorist attacks on 9/11, as one of the on-scene commanders in Yemen after the bombing of the USS Cole, and as the special agent in charge of special events and SWAT in New York City.

Mary held other leadership roles during her 25-year tenure with the FBI.

  • Chief Inspector of the FBI
  • Led a director’s initiative on risk-based management
  • Assistant Special Agent in Charge (ASAC), Administrative division, New York office

Mary holds a bachelor's degree from Fordham University, Bronx, New York, a master's degree in Psychology from the New School for Social Research, New York, New York and an honorary doctorate of Law from Marian University, Fond du Lac, Wisconsin. She is an FBI-certified crisis negotiator and crisis manager.

As used in this document, “Deloitte” means Deloitte & Touche LLP, a subsidiary of Deloitte LLP. Please see for a detailed description of the legal structure of Deloitte LLP and its subsidiaries. Certain services may not be available to attest clients under the rules and regulations of public accounting.


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