Brigadier General Steven L. Allen is the Commandant for the US Army Ordnance School, the Deputy Commanding General for Readiness at the Combined Arms Support Command, and the Director of the Enterprise Business Systems - Convergence Multifunctional Capabilities Team. He enlisted in the United States Army Reserve in 1984 while attending school and later earned his commission as an Infantry Officer. Brigadier General Allen graduated from the University of North Dakota with a Bachelor of Science Degree in Industrial Technology. He earned a Master of Science Degree in Administration from Central Michigan University, a Master of Business Administration Degree from the Florida Institute of Technology and a Masters of Strategic Studies Degree from the United States Army War College.

Brigadier General Allen's command assignments include the Headquarters and Alpha Company, 210th Forward Support Battalion 10th Mountain Division from November 1994 to April 1996. Commander of the 402D Brigade Support Battalion, 5th Brigade, 2nd Infantry Division (Stryker Brigade Combat Team) Fort Lewis, Washington, from February 2007 to September 2010 which included a deployment to Afghanistan, in support of Operation Enduring Freedom. Commander of the 407th Army Field Support Brigade, Fort Hood, Texas from July 2012 through July 2014. Commanding General of the 19th Expeditionary Sustainment Command in the Republic of Korea from 9 June 2020 to 29 June 2022.

Key staff assignments include: 1st Infantry Division at Ft. Riley as the 1st Brigade Combat Team S4 in 2002. Support Operations Officer in the 101st Forward Support Battalion with a deployment in support of Operation Iraqi Freedom from September 2003 to September 2004. He became the Forward Support Battalion Executive Officer after his deployment. From June 2005 to 2007, he was an instructor and writer at the Command and General Staff College. I Corps G4 Chief of Supply and Services at Joint Base Lewis-McChord from September 2010 to June 2011. Director of Logistics J4 at United States Special Operations Command (USSOCOM) from August 2014 to August 2017. Army Sustainment Command Chief of Staff from September 2017 to August 2019. From September 2019 to May 2020, he was the Deputy Commanding General for Army Sustainment Command Rock Island Arsenal, Illinois. From June 2022 to June 2023, he was the Director of United States Forces Korea J4, Assistant Chief of Staff of United Nations Command U4, and Deputy Director of ROK-US Combined Forces Command C4.

His military education includes the Infantry Officer Basic Course, Quartermaster Officer Advanced Course, Combined Arms Service Staff School, U.S. Army Command and General Staff College, and the U.S. Army War College.

BG Allen's awards and decorations include the Defense Superior Service Medal (1 Bronze Oak leaf Cluster), Legion of Merit (2 Bronze Oak Leaf Clusters), Bronze Star Medal (2 Bronze Oak Leaf Clusters), Meritorious Service Medal (4 Bronze Oak Leaf Clusters), Combat Infantryman Badge, Expert Infantryman Badge, Army Parachutist Badge, Air Assault Badge, Parachute Rigger Badge and the German Parachutist Badge.