Have you read Chris Miller's bio? His military experience is highly notable.
https://en.wikipedia.org/wiki/Christopher_C._Miller
Miller served in the military from 1983 to 2014.[3] He started as an enlisted soldier, then was commissioned as a second lieutenant in 1987, and then joined the United States Army Special Forces in 1993.[5][17]
He received a Master of Arts in national security studies from the Naval War College in 2001.[1][18] He also graduated from the College of Naval Command and Staff and the Army War College.[7]
He participated in wars in Afghanistan and Iraq. In Afghanistan, he was a company commander in the 5th Special Forces Group, which fought al-Qaeda and the Taliban. In Iraq, he commanded Special Forces units in 2006 and 2007.[17] His promotion to colonel was approved in December 2009.[19]
Miller served as program executive officer (PEO) for rotary wing programs at U.S. Special Operations Command in 2010.[20] One of his last assignments as an Army officer was as Director for Special Operations and Irregular Warfare in the Office of the Assistant Secretary of Defense for Special Operations/Low-Intensity Conflict & Interdependent Capabilities at the Pentagon in 2011.[21]