Web Reference: 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. Learn about Mark "Oz" Geist, a former Marine, security contractor, and co-author of 13 Hours. He fought in the Battle of Benghazi and helped save 25 lives. Apr 26, 2023 · Mark Oz Geist is a veteran of the United States Marine Corps as well as a member of the Benghazi security team. He is also the co-author of the best-selling 13-hour book: an internal account of what happened in Benghazi.
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Mark Oz Geist - Latest Information & Updates 2026 Information & Biography

Details: $22M - $48M
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Last Updated: April 2, 2026
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