Oklahoma National Guard  –   Brigadier General Harrison hung up his uniform on May 6, 2023, after a moving retirement ceremony at the Army Aviation Support Facility in Lexington, Oklahoma, after 39 years of service.

In his last assignment as the assistant adjutant general - Army, Harrison advised and assisted the adjutant general on the preparation of Oklahoma Army National Guard units for homeland defense and mobilization, with oversight of training, administration, logistics, and personnel actions.

Harrison commissioned in 1988 through the Reserve Officer Training Corps at Northeastern State University. Before receiving his commission, he served four years as an enlisted member of the Oklahoma Army National Guard.

Harrison attended several military schools, including the United States Army War College in Carlisle Barracks, Pennsylvania, where he earned a Master of Strategic Studies.
He also holds a Master of Business Administration in Human Resource Management from Trident University International in Cypress, California, and a Bachelor's degree in Accounting from Northeastern State University in Tahlequah, Oklahoma.

During his career, General Harrison was promoted several times, ultimately attaining the rank of Brigadier General on November 1, 2017.

He held a variety of positions in his assignments, including Army Aviation Division Chief and the Director of the Joint Staff.

Harrison's advice and guidance have been invaluable to the Oklahoma Army National Guard, its Citizen-Soldiers, and their families. His leadership has played a critical role in ensuring the readiness and success of the Guard in fulfilling its duties.

He will be deeply missed by his colleagues and those who have had the privilege of working with him.