The Under Secretary of Defense for Acquisition and Sustainment,or USD (A&S),is the Principal Staff Assistant (PSA) and advisor to the Secretary of Defense for all matters relating to acquisition and sustainment in the Department of Defense. This includes the DoD Acquisition System;system design and development;production;logistics and distribution;installation maintenance,management,and resilience;military construction;procurement of goods and services;material readiness;maintenance;environment and energy resilience;utilities;business management modernization;International Armaments Cooperation,Cooperative Acquisition and International Agreements,Promoting exportability of military components to allies and partners;nuclear,chemical and biological defense programs;and nuclear command,control,and communications.
Keith W. Dayton is a retired lieutenant general in the United States Army who currently serves as the director of the George C. Marshall European Center for Security Studies in Garmisch-Partenkirchen,Germany. Dayton served as the U.S. Security Coordinator for Israel-Palestinian Authority in Tel Aviv,Israel from December 2005 to October 2010. He has also served as the Director of the Iraq Survey Group,as a senior member of the Joint Staff,and as U.S. Defense Attachéin the U.S. Embassy in Moscow,Russia.
James Edwin McPherson is an American government official and retired United States Navy rear admiral. He served as the General Counsel of the Army from January 2,2018,to March 24,2020. He served as the United States Under Secretary of the Army from March 25,2020,to January 20,2021,and in acting capacity from July 23,2019,to March 24,2020. He served as Acting United States Secretary of the Navy from April 7,2020,to May 29,2020,following the resignation of Thomas Modly.
Susan Combs is an American politician,having served elected office in Texas and served as the Assistant Secretary of Policy,Management and Budget at the U.S. Department of the Interior as an appointed official under President Donald J. Trump.
Joseph Francis Dunford Jr. is a retired United States Marine Corps general who served as the 19th chairman of the Joint Chiefs of Staff from 1 October 2015 to 30 September 2019. He was the 36th commandant of the Marine Corps. Dunford is the first Marine Corps officer to serve in four different four-star positions;the others include commander of the International Security Assistance Force and United States Forces –Afghanistan from February 2013 to August 2014,and as the thirty-second assistant commandant of the Marine Corps from 23 October 2010 to 15 December 2012. He has commanded several units,including the 5th Marine Regiment during the 2003 invasion of Iraq.
The United States under secretary of the Army is the second-highest-ranking civilian official of the United States Department of the Army,serving directly under the United States Secretary of the Army. The Secretary and Under Secretary,together with two military officers,the Chief of Staff of the United States Army and the Vice Chief of Staff of the United States Army,constitute the senior leaders of the United States Army.
The Assistant Secretary of the Army for Installations,Energy and Environment is a civilian office within the United States Department of the Army.
Mario Peter Fiori served as United States Assistant Secretary of the Army from 2001 to 2003.
The Assistant Secretary of Defense for Energy,Installations,and Environment,concurrently the Chief Sustainability Officer,and formerly known as the Deputy Under Secretary of Defense for Installations and Environment,provides management and oversight of military installations worldwide and manages environmental,safety,and occupational health programs for the Department of Defense (DoD). DoD's installations cover some 29,000,000 acres (120,000 km2),with 539,000 buildings and structures valued at more than $700 billion. The responsibilities of the ASD(EI&E) include the development of installation capabilities,programs,and budgets;installation-energy programs and policy;base realignment and closure;privatization of military housing and utilities;and integration of environmental needs into the weapons acquisition process. The ASD(EI&E) is also responsible for environmental management,safety and occupational health;environmental restoration at active and closing bases;conservation of natural and cultural resources;pollution prevention;environmental research and technology;fire protection;and explosives safety. The ASD(EI&E) reports to the Under Secretary of Defense for Acquisition and Sustainment,and is a part of the Office of the Secretary of Defense.
Ricky "Rick" Allen Dearborn is an American government official and lobbyist who served as the White House Deputy Chief of Staff for Legislative,Intergovernmental Affairs and Implementation in the first administration of U.S. President Donald Trump for less than a year from 2017 to 2018. Prior to this role,he was the executive director of Donald Trump's 2016 presidential transition team and served in various positions on the U.S. Senate staff.
Danny Ray Brouillette is an American government official,lobbyist and businessman who served as the United States Secretary of Energy in the Donald Trump administration from 2019 to 2021. He previously served as the deputy secretary of energy from August 2017 to December 2019. In 2023,Brouillette was named president and chief executive officer elect of the Edison Electric Institute.
Ryan D. McCarthy is an American business executive and former U.S. Army Ranger who served as the 24th United States Secretary of the Army,from 2019 to 2021. He previously held the office in an acting capacity in 2017 and 2019.
Lucian L. Niemeyer is an American consultant and government official who served as Assistant Secretary of Defense for Energy,Installations and Environment from 2017 to 2021. He was nominated for the position by President Donald Trump in June 2017 and was confirmed by the United States Senate on August 1,2017,by voice vote. On June 26,2019,after a reorganization within the Office of the Secretary of Defense,Niemeyer became Acting Assistant Secretary of the Navy for Energy,Installations and Environment.
John W. Henderson is an American engineer,United States Army engineer officer,and government official. He served as Assistant Secretary of the Air Force in the Trump administration. His nomination by President Donald Trump was confirmed by the U.S. Senate on February 15,2018. Prior to his nomination,Henderson most recently served in the U.S. Army as the Commander of the Omaha District,Army Corps of Engineers. He has over 23 years of active military experience as an Army engineer officer,including serving two combat tours to Iraq and one combat tour to Afghanistan as an engineer battalion task force commander.
John Euler Whitley is an American government official who served as the acting United States Secretary of the Army from January 20,2021,to May 28,2021. He previously serviced as Assistant Secretary of the Army and acting director of cost assessment and program evaluation for the Department of Defense.
Alex Albert Beehler is a professor,lawyer,and former senior American government official,who served as the Assistant Secretary of the Army for Installations,Energy and Environment between 2019 and 2021.
Meredith Ashley Berger is an American government official who had served as the United States Assistant Secretary of the Navy for Energy,Installations,and Environment. From August 25,2021,until April 13,2022,she concurrently served as the designated official performing the duties of the United States Under Secretary of the Navy.
Dennis Vincent McGinn is a former American government official and retired United States Navy admiral. He served as Assistant Secretary of the Navy for Energy,Installations and Environment in the Obama administration from 2013 to 2017. A career naval aviator,McGinn was an officer in the United States Navy for 35 years,retiring as a vice admiral.
United States Army 