Guy Castagne

Guy Castagne

C.Tech., CFEI, CVFI | Forensic Investigator

Specialties: Fire & Explosion | Mechanical Engineering

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Office : Ottawa

Phone : 613 234 1668

Email :




Guy Castagne joined CEP’s Fire & Explosion team in Ottawa in September 2022. Prior to joining CEP, Guy worked within the Fuels Safety program at Ontario’s Technical Standards & Safety Authority for 17 years. He also worked in the HVAC industry for 15 years, both as a technician and a commercial/industrial gas instructor at La Cité Collégiale. He also served in other roles, such as vice chair at the Regional Common Ground Alliance, acting statutory director under the Technical Standards & Safety Act, and as a member of the B149.1 code committee.



As a forensic investigator, Guy conducts fire and explosion and general mechanical engineering investigations and prepares expert reports for clients.


  • Mechanical Engineering
  • Mechanical systems & equipment
  • Electronic and pneumatic building automation systems
  • Commercial and industrial heating and air conditioning systems (HVAC)
  • Fire and Explosion
  • Arc mapping
  • Fire Patterns
  • Origin and cause determination
  • Failure analysis