- 1st year as Assistant Football Coach
- Hometown: Santa Ana, CA
- High School: Servite High School
- College: Fullerton Junior College/Fresno State
Coach Callahan will be entering his 43rd year of coaching football, and his first year at Dodge City Community College. During his career Coach Callahan has coached at the community college level, and the four year level, and the high school level. He will be entering his 26th year as a defensive coordinator, the same position he will serve for the conquistadors. Coach Callahan began his career at Fresno State University as the linebacker coach and has made stops at Cal State University Fullerton, Laguna Hills High School, Capistrano Valley High School, Mater Dei High School, and the last 17 years with Cerritos Community College, where he coached Thomas.