Sean Gray Captain, Cobb County Fire & Emergency Services Sean Gray currently holds the rank of Captain with Cobb County Fire and Emergency Services in Metro Atlanta and has been in the fire service since 1993. He has a bachelor’s degree in Fire Safety Engineering and is working towards furthering his education. He has been a member of multiple technical panels involving firefighter safety research and is a NFPA committee member for Fire Hose and Fire Service Training Facilities. He recently co-authored a PennWell Publications DVD and Book, The Evolving FireGround. He has also been published in multiple Fire Service magazines, is an FDIC H.O.T. Lead instructor, runs the website stopbelievingstartknowing.com, and delivers evidence-based tactics training classes across the U.S.