Lieutenant Colonel Sagerholm earned a Bachelor of Science in Economics from the United States Naval Academy in 2008, commissioning immediately upon graduation. Following completion of The Basic School and Field Artillery Basic Course in 2009, Lieutenant Colonel Sagerholm reported to 1st Battalion, 12th Marines in Kaneohe Bay, Hawaii. While there, he served as a forward observer, guns platoon commander, and a position commander deploying to Sangin Province, Helmand, Afghanistan in 2011.
Upon redeployment from Afghanistan, Lieutenant Colonel Sagerholm reported to the Marine Corps Mountain Warfare Training Center, Bridgeport, California. Following completion of Winter and Summer Mountain Leaders Course, he promoted to Captain in 2012 and became the Officer-in-Charge of the Mountain Leader’s Schools. He then served as the Officer-in-Charge of the Mountain Warfare Training Group and the Future Operations Officer.
In 2015, Lieutenant Colonel Sagerholm reported to the Expeditionary Warfare School in Quantico, Virginia. Upon graduation, he reported to 1st Battalion, 11th Marines in Camp Pendleton, California. In 2016, Lieutenant Colonel Sagerholm attached to 3rd Battalion, 1st Marines as the Battalion Fire Support Officer and deployed to Okinawa, Japan on the Unit Deployment Program. Upon return in 2017, Lieutenant Colonel Sagerholm became the assistant operations officer for 1st Battalion, 11th Marines. Shortly after this assignment, Lieutenant Colonel Sagerholm took command of India Battery, 3rd Battalion, 12th Marines
(attached) and deployed on the 31st Marine Expeditionary Unit with BLT 1/1 from 2017 to 2018.
In 2018, Lieutenant Colonel Sagerholm attended the Naval Post-Graduate School in Monterey, California where he promoted to Major. While there, Lieutenant Colonel Sagerholm earned a dual Master of Science in Applied Physics and a separate degree in Space Systems Operations.
Following graduation in 2020, Lieutenant Colonel Sagerholm reported to United States Space Command, Colorado Springs, Colorado. While there, he served in the J5 on the Russia Contingency Branch. He then became the branch chief for Strategic Communications and eventually the Sensitive Activities Chief with the J5/39 for perception management and military deception.
In 2023, Lieutenant Colonel Sagerholm reported to United States Forces Japan support detachment. In 2024, he promoted to his present rank and laterally transferred to become a Maritime Space Officer.
Lieutenant Colonel Sagerholm’s military decorations include the Defense Meritorious Service Medal (2nd award), Navy and Marine Corps Commendation Medal (2nd award), Joint Service Achievement Medal, Navy and Marine Corps Achievement Medal, and Combat Action Ribbon.