Army career
Rainey was commissioned as an infantry officer through ROTC at Eastern Kentucky University in 1987. As a lieutenant, he served as a platoon leader and company executive officer in the 3rd Battalion, 505th Parachute Infantry Regiment, 82nd Airborne Division and later as a rifle platoon leader and company executive officer in the 3rd Battalion, 75th Ranger Regiment. [5]
Following the Infantry Advanced Course, he commanded the Long Range Surveillance Detachment in the 1st Cavalry Division and Hotel Company, 3rd U.S. Infantry (The Old Guard). Rainey was then assigned as a Joint Chiefs of Staff intern in Washington, D.C. His next assignments included: chief of plans for the 2nd Infantry Division; operations officer for 1st Battalion, 9th Cavalry; and executive officer to the III Corps commander. [5]
During Operation Iraqi Freedom I, he was a G3 operations officer in the V Corps assault command post. Following that, he was the executive officer of the 3rd Brigade Combat Team, 1st Cavalry Division, and then he commanded Task Force 2-7 CAV during Operation Iraqi Freedom II. Following battalion command, Rainey served as the chief of war on terror plans for U.S. European Command. He next served as the G3 of the 4th Infantry Division and the Multi-National Division-Baghdad (MND-B), and commanded the 3rd Heavy Brigade Combat Team (HBCT), 4th Infantry Division at Fort Carson and in Iraq. Following command, he served as the U.S. Army Fellow at the Korbel School of International Relations, Denver University. [5]
Rainey became the deputy commanding general (maneuver) of the 4th Infantry Division in July 2013, and was promoted to brigadier general on 2 August 2013. From July 2014 to July 2015, he served as the commandant of the United States Army Infantry School. He was then the commanding general of the 3rd Infantry Division until May 2017, and was promoted to major general on 2 May 2016. From June 2017 to August 2018, Rainey was the Assistant Deputy Chief of Staff of the United States Army. He became the commander of the Combined Security Transition Command – Afghanistan in October 2018, and in the same month was promoted to lieutenant general. He was the commanding general of the United States Army Combined Arms Center and Commandant of the United States Army Command and General Staff College from December 2019 to May 2021. [6] [7] [8]
From June 2021 to October 2022, Rainey was the Deputy Chief of Staff of the Army for Operations, Plans, and Training (G-3/5/7), in Washington, D.C. [6] [9] On 6 September 2022, Rainey was nominated for promotion to general [10] and assigned as commanding general of the United States Army Futures Command. [11] [12] His nomination was confirmed by voice vote of the Senate on 29 September 2022. [10] Rainey was promoted on 4 October 2022 and took up his post as commander of Army Futures Command. [6] He retired on 1 October 2025, when Futures Command was merged with the Training and Doctrine Command to form the new United States Army Transformation and Training Command. [13]
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