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Fire Investigators - 33-2021.02

O*NET-SOC Description

Conduct investigations to determine causes of fires and explosions.

Sample of Reported Job Titles

  • Arson Division Chief
  • Arson Investigator
  • Canine Handler (K9 Handler)
  • Fire and Explosion Investigator
  • Fire Investigator
  • Fire Lieutenant
  • Fire Marshal
  • Investigator
  • Lieutenant
  • State Fire Marshal

SOC Occupation Groups

Related Occupations


  • Analyze evidence and other information to determine probable cause of fire or explosion.
  • Conduct internal investigation to determine negligence and violation of laws and regulations by fire department employees.
  • Coordinate efforts with other organizations, such as law enforcement agencies.
  • Dust evidence or portions of fire scenes for latent fingerprints.
  • Examine fire sites and collect evidence such as glass, metal fragments, charred wood, and accelerant residue for use in determining the cause of a fire.
  • Instruct children about the dangers of fire.
  • Package collected pieces of evidence in securely closed containers, such as bags, crates, or boxes, to protect them.
  • Photograph damage and evidence related to causes of fires or explosions to document investigation findings.
  • Prepare and maintain reports of investigation results, and records of convicted arsonists and arson suspects.
  • Subpoena and interview witnesses, property owners, and building occupants to obtain information and sworn testimony.
  • Swear out warrants, and arrest and process suspected arsonists.
  • Teach fire investigation techniques to other firefighter personnel.
  • Test sites and materials to establish facts, such as burn patterns and flash points of materials, using test equipment.
  • Testify in court cases involving fires, suspected arson, and false alarms.

Detailed Work Activities

  • Analyze crime scene evidence.
  • Apprehend criminal suspects.
  • Collaborate with law enforcement or security agencies to respond to incidents.
  • Educate the public about fire safety or prevention.
  • Examine crime scenes to obtain evidence.
  • Examine debris to obtain information about causes of fires.
  • Interview people to gather information about criminal activities.
  • Investigate crimes committed within organizations.
  • Prepare investigation or incident reports.
  • Process forensic or legal evidence in accordance with procedures.
  • Record crime or accident scene evidence with video or still cameras.
  • Record information about suspects or criminals.
  • Testify at legal or legislative proceedings.
  • Train personnel in technical or scientific procedures.
  • Train personnel to enhance job skills.

Military Crosswalk Titles

  • Aviation Boatswain's Mate, Aircraft Handling (Navy - Enlisted)
  • Cannon Crewmember (Army - Enlisted)
  • Cavalry Scout (Army - Enlisted)
  • Combat Engineer (Army - Enlisted)
  • Combat Medic Specialist (Army - Enlisted)
  • Expeditionary Firefighting and Rescue (EFR) Specialist (Marine Corps - Enlisted)
  • Infantryman (Army - Enlisted)
  • Intelligence Analyst (Army - Enlisted)
  • M1 Armor Crewman (Army - Enlisted)
  • Military Police (Army - Enlisted)
  • Unit Supply Specialist (Army - Enlisted)

Apprenticeship Crosswalk Titles

  • Arson and Bomb Investigator
  • Fire Marshall

DOT Crosswalk Titles

  • Arson And Bomb Investigator
  • Fire Marshal
  • Fire-Investigation Lieutenant