Beast Feast

MEET OUR BEAST

Join our 2026 Beast Feast with guest speaker, Mark “Oz” Geist, Bestselling co-author of 13 Hours, decorated security and military consultant, and the hero credited with saving 25 lives during the Benghazi attack. His story is more than history—it’s a testament to bravery, sacrifice, and leadership..

Mark “Oz” Geist is a member of the Annex Security Team that fought the Battle of Benghazi, Libya, from September 11 to September 12, 2012. A Colorado native, Mr. Geist joined the United States Marine Corps in 1984. During his time in the service, he served in Barracks Duty in the Philippines, then with the 2nd Battalion 9th Marines Golf Company, as well as the Surveillance and Target Acquisition Platoon. He then was chosen to serve in the newly formed Marine Cadre program as an Anti-/Counter- Terrorism Instructor. Upon the completion of a very successful tour and re-enlistment, Mr. Geist changed his military occupational specialty to the Intelligence field, specializing in Interrogation Translation.

After serving 12 years in the United States Maine Corps, Mr. Geist became a Deputy Sheriff in Teller County, Colorado. In that role, he was assigned as liaison with the Vice Narcotics and Intelligence Unit in Colorado Springs, Colorado, as well as an Investigator for Crimes against Children. Certified as a Forensic Interviewer of children, he investigated numerous case of abuse in which he helped to secure convictions of the perpetrators..

Beyond his military career, John is a passionate advocate for veterans battling PTSD and traumatic brain injuries (TBI), ensuring they receive the care and support they deserve.