Lieutenant Colonel Rash entered the Marine Corps Reserves on 25 May 2001 and completed Basic Recruit training on 17 August 2001 in Parris Island, South Carolina. He was assigned to Ammunition Company, 4th Supply Battalion, 4th Force Service Support Group. He deployed to Al-Taqaddam, Iraq in 2005 in support Operation Iraqi Freedom with Supply Detachment, Combat Logistics Regiment 25 as the Due In and Status Clerk.
Upon graduation from Erskine College, Due West, South Carolina in 2007, Lieutenant Colonel Rash was commissioned a second Lieutenant. Following completion of The Basic School he attended Communications Systems Officer course and Signals Intelligence Officer course. 2nd Lieutenant Rash began his Active Duty Tour as the Operational Control and Analysis Platoon Commander for B Company, 1st Radio Battalion. He received orders to Military Transition Team, 7th Iraqi Army Division. Upon completion of 1st Marine Expeditionary Force Combat Advisor Course, 1st Lieutenant Rash deployed to Al Asad, Iraq in 2009 as the Assistant Operations Officer and Training Advisor. Upon completion of this deployment, he was assigned as the Future Plans Officer for 1st Radio Battalion.
In 2011 Captain Rash rejoined the Marine Corps Reserve and received order to C Company, 4th Landing Support Battalion in Charleston, South Carolina as the Executive Officer. Captain Rash attending Logistics Officer Course in 2011. In 2014, following Fiscal Reorganization, Captain Rash was assigned as the Officer In Charge, Detachment 3, Supply Company, Combat Logistics Battalion 451.
In November 2016, Captain Rash transferred to Landing Support Company, Combat Logistics Regiment 45 where he served as the Company Commander. He was promoted to Major in August of 2017.
In December 2019, Major Rash transferred to Marine Wing Support Squadron 472, where he served as the Operations Officer for the squadron. During this time, he completed Weapons and Tactics Instructor Course in October of 2020.
In March 2023 Major Rash transferred to Combat Logistics Battalion 451 to serve as the battalion executive officer. He was promoted to his current rank on 1 April 2024.
Lieutenant Colonel Rash’s has worked on automated information system projects for the Marine Corps to include Joint-Tactical Communication Workstation, Common Operational Picture – Marine Corps, Command Operations Center, and Distributed Common Ground System – Marine Corps.