Mark has over 18 years of experience as both a volunteer and career firefighter. He has 8 years of experience conducting both criminal and civil fire investigations. Mark is an active member of the MABAS Division 41 fire investigation team. Mark is a Certified Fire Investigator (CFI) by the International Association of Arson Investigators, and is also a Certified Fire and Explosion (CFEI) Investigator by the National Association of Fire Investigators. He is also a Certified Fire Investigator by the Office of the Illinois State Fire Marshal.