Senate-confirmed in May 2022, the Honorable Christopher Lowman, the former senior official performing the duties of Under Secretary of the Army, took office as Assistant Secretary of Defense for Sustainment (ASD(S)) in June 2022.

As ASD(S), Mr. Lowman is the principal staff assistant and advisor to the Under Secretary of Defense for Acquisition & Sustainment (USD(A&S)), Deputy Secretary of Defense, and Secretary of Defense on DoD logistics, materiel readiness, and product support. On behalf of the USD(A&S), Mr. Lowman oversees the Defense Logistics Agency and Defense Microelectronics Activity, and is the principal logistics official within senior DoD management. He has served across the U.S. Army and the Joint Force for more than three decades.

From 2021-2022, Mr. Lowman served as the senior official performing the duties of Under Secretary of the Army. As the Secretary of the Army’s senior civilian assistant and principal advisor on matters related to managing and operating the Army, he was also the Chief Management Officer of the Army and the Secretary’s principal advisor on effective and efficient organization of business operations and transformation initiatives, the senior official for all Executive and Senior Professional personnel actions, and responsible for supervising and directing all civilian senior leaders.

From 2018-2021, Mr. Lowman served as the Assistant Deputy Chief of Staff (ADCS), G-3/5/7 (Tier 3), providing oversight and guidance to the Strategy, Plans and Policy; Cyber Operations; Administration and Resources; and Command and Control Support Agency Directorates. His focus included Planning, Programming, Budgeting and Execution of Deputy Chief of Staff, G-3/5/7 program and budget; cyber activities; special access programs; sensitive activities programs; and support to non-Army agencies.