Mohler received a degree in biology from the University of Nevada, Reno. He began working for AIDS Ambulance at age 19. In 1977 he began teaching CPR classes, and in 1980 he became an EMT. He became an RN in 1985 and began flying for St. Mary's Hospital's Care Flight.

McClintock volunteered for the Cal-Nev-Ari, Nevada Fire Department in 1980. In 1990 he began working at the Clark County Fire Department, where he worked until his retirement in 2009.