First Deputy Commissioner

Daniel Flynn

First Deputy Commissioner Flynn reports directly to Fire Commissioner Bonsignore. As First Deputy Commissioner, Flynn is charged with managing the day-to-day operations and activities of the FDNY across all offices and bureaus.

Flynn was appointed to the FDNY in 2005, beginning his career at Ladder Company 114 in Brooklyn. He worked there until his promotion to Fire Marshal in 2009. Five years later, he was promoted to Lieutenant and worked in the 8th Division. In November of 2016, he was promoted to Supervising Fire Marshal. Prior to joining the FDNY, Flynn served as a Police Officer with the New York City Police Department (NYPD) from July 1999 to May 2005.

Flynn oversaw the Bureau of Fire Investigation as Chief Fire Marshal from April 2021 to February 2026. In that capacity, he was instrumental in identifying the growing danger of lithium-ion batteries in New York City and shaped the FDNY's response to the hazard. Flynn advocated for legislation at the city, state, and federal levels to prevent dangerous, unregulated batteries from entering New York City and played a key role in educating the public about their risks.

Before his appointment to Chief Fire Marshal, Flynn oversaw the FDNY Special Investigations Unit (SIU), which is responsible for conducting complex and high-profile criminal investigations. Flynn supervised the work of numerous Fire Marshals handling a wide range of arson cases. Flynn has been cross-designated as a Federal Supervisory Task Force Officer with the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) since 2017, responsible for coordinating local investigative efforts with State and Federal partners at the site of any major arson incident. Having undergone extensive training in the field of advanced fire scene examination, Flynn has served as a qualified technical and legal expert in the determination of origin and cause of fires to support criminal prosecutions.

Between 2010 and 2018, Flynn received 38 citations recognizing his tenacity and resourceful investigative work. Most notably, he was the recipient of the Deputy Commissioner Christine R. Godek Medal in 2012 for his efforts in uncovering a criminal conspiracy that included arson, kidnapping, assault and robbery following a 3-alarm fire on Staten Island where 10 Firefighters had been seriously injured. That long-running investigation concluded with the incarceration of four violent felony offenders.