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Assistant Secretary of Defense for Manpower and Reserve Affairs

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In the United States Department of Defense, the assistant secretary of defense for manpower and reserve affairs (ASD (M&RA))[1] serves as principal staff assistant and advisor to the secretary of defense, deputy secretary of defense and under secretary of defense for personnel and readiness, with responsibility for "overall policies and procedures of [U.S.] Total Force manpower, personnel and reserve affairs,"[2] including the Army National Guard, Army Reserve, Navy Reserve, Marine Corps Reserve, Air National Guard, Air Force Reserve and Coast Guard Reserve. The ASD (M&RA) reports directly to the under secretary of defense (P&R) and exercises authority, direction, and control over the National Committee for Employer Support of the Guard and Reserve.[3]

AbbreviationASD (M&RA)
Appointer
Quick facts Assistant Secretary of Defense for Manpower and Reserve Affairs, Abbreviation ...
Assistant Secretary of Defense
for Manpower and Reserve Affairs
Seal of the assistant secretary of defense for manpower and reserve affairs
Flag of an assistant secretary of defense
Incumbent
Tim Dill
since December 29, 2025
Department of Defense
AbbreviationASD (M&RA)
Member ofOffice of the Secretary of Defense
Reports toUnder Secretary of Defense for Personnel and Readiness
Appointer
Term length
Formation12 January 1984 (1984-01-12)
First holderJim Webb
Salary$165,300
WebsiteOfficial website
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Responsibilities

According to a statement of intent signed by the ASD (M&RA), the purpose of the office is "to set the conditions for a sustainable, seamlessly integrated and complementary total force." To do so, the ASD (M&RA) seeks to "proactively deliver credible advice and information about the capabilities of the reserve components," and "develop the policies and resources necessary to fully exploit those capabilities."[4] The language of these statements is precise and deliberate. As the statement of intent explains:

  • The ASD (M&RA) "sets the conditions" because the individual armed services must integrate the forces themselves.
  • “Seamlessly integrated” and “complementary” are characteristics of a reserve force that can augment and reinforce the active components in every facet of the National Security Strategy. These characteristics imply an absence of friction and a mutually supporting force structure.
  • A “total force” is the combination of active and reserve components that service chiefs provide willingly, and that unified combatant commanders can utilize effectively.
  • “Delivering credible advice and information” requires fidelity to fact and a humility that avoids boastfulness and over-promising.
  • “Resources” include modern and well-positioned equipment and facilities, and the assets necessary for a force that is trained for both irregular and conventional warfare prior to mobilization and deployment.
  • To "exploit" reserve capabilities means “to take full advantage” of them. In business, it would mean a high return on investment.

The statement of intent also sets out a metric for this office's performance: "Our success will be measured by the degree to which we have advanced a culture of mutual appreciation and confidence in both the active and reserve components."[4]

History

The title and portfolio of the assistant secretary for manpower and reserve affairs has evolved several times over the years. An assistant secretary of defense was first assigned oversight of DoD manpower and personnel affairs in 1950 by Secretary George C. Marshall. In September 1955, Secretary Charles Wilson redesignated the position as Assistant Secretary of Defense (Manpower, Personnel, and Reserve).[5]

DoD Directive 5120.27 (31 January 1961) redesignated the position as Assistant Secretary of Defense (Manpower), but after a few years, the Reserve Forces Bill of Rights and Vitalization Act (P.L. 90-168, signed 1 December 1967), changed the title to Assistant Secretary of Defense (Manpower and Reserve Affairs).[5]

Defense Directive 5124.1, signed 20 April 1977, combined the position with the assistant secretary of defense (installations and logistics) to become the assistant secretary of defense (manpower, reserve affairs, and logistics).[5]

Following the FY 1984 Defense Authorization Act (P.L. 98-94, 24 September 1983), the title was changed to Assistant Secretary of Defense (Manpower, Installations, and Logistics), and the reserve affairs functions were reconstituted into a new position called Assistant Secretary of Defense (Reserve Affairs).[5]

The assistant secretary of defense (reserve affairs) became a reporting official to the under secretary of defense for personnel and readiness when the latter role was established through the National Defense Authorization Act for Fiscal Year 1994 (P.L. 103-160).[6]

Section 902 of the Carl Levin and Howard P. "Buck" McKeon National Defense Authorization Act for Fiscal Year 2015 (P.L. 113-291, 19 December 2014) redesignated the position as the assistant secretary of defense for manpower and reserve affairs.[7]

Officeholders

More information Name, Tenure ...
Assistant secretaries of defense for manpower and reserve affairs (and preceding offices)[3]
Name Tenure SecDef(s) served under President(s) served under
Assistant Secretary of Defense (Manpower and Personnel)
Anna M. RosenbergNovember 15, 1950 – January 20, 1953George C. Marshall
Robert A. Lovett
Harry Truman
John A. HannahFebruary 11, 1953 – July 31, 1954Charles E. WilsonDwight Eisenhower
Carter L. BurgessSeptember 24, 1954 – September, 1955Charles E. WilsonDwight Eisenhower
Assistant Secretary of Defense (Manpower, Personnel, and Reserve)
Carter L. BurgessSeptember, 1955 – January 22, 1957Charles E. WilsonDwight Eisenhower
William H. FrancisApril 19, 1957 – May 24, 1958Charles E. Wilson
Neil H. McElroy
Dwight Eisenhower
Charles O. FinucaneJuly 15, 1958 – January 19, 1961Neil H. McElroy
Thomas S. Gates
Dwight Eisenhower
Assistant Secretary of Defense (Manpower)
Carlisle P. RungeFebruary 17, 1961 – July 30, 1962Robert S. McNamaraJohn F. Kennedy
Norman S. PaulAugust 8, 1962 – September 30, 1965Robert S. McNamaraJohn F. Kennedy
Lyndon Johnson
Thomas D. MorrisOctober 1, 1965 – August 31, 1967Robert S. McNamaraLyndon Johnson
Alfred B. FittOctober 9, 1967 – December 31, 1967Robert S. McNamaraLyndon Johnson
Assistant Secretary of Defense (Manpower and Reserve Affairs)
Alfred B. FittJanuary 1, 1968 – February 20, 1969Robert S. McNamara
Clark M. Clifford
Melvin R. Laird
Lyndon Johnson
Richard Nixon
Roger T. KelleyMarch 3, 1969 – June 1, 1973Melvin R. Laird
Elliot L. Richardson
Richard Nixon
Carl W. Clewlow (Acting)June 1, 1973 – September 1, 1973Elliot L. Richardson
James R. Schlesinger
Richard Nixon
William K. BrehmSeptember 1, 1973 – March 18, 1976James R. Schlesinger
Donald H. Rumsfeld
Richard Nixon
Gerald Ford
David P. TaylorJuly 7, 1976 – February 12, 1977Donald H. Rumsfeld
Harold Brown
Gerald Ford
Jimmy Carter
Assistant Secretary of Defense (Manpower, Reserve Affairs, and Logistics)
John P. WhiteMay 11, 1977 – October 31, 1978Harold BrownJimmy Carter
Robert B. Pirie, Jr.June 17, 1979 – January 20, 1981Harold BrownJimmy Carter
Lawrence J. KorbMay 4, 1981 – January 12, 1984Caspar W. WeinbergerRonald Reagan
Assistant Secretary of Defense (Reserve Affairs)
Jim WebbMay 3, 1984 - April 10, 1987Caspar W. WeinbergerRonald Reagan
Stephen M. DuncanOctober 26, 1987 - January 20, 1993Caspar W. Weinberger
Frank C. Carlucci III
William H. Taft IV (Acting)
Richard B. Cheney
Ronald Reagan
George H. W. Bush
Deborah R. LeeJune 1, 1993 - April 11, 1998Leslie Aspin, Jr.
William J. Perry
William S. Cohen
Bill Clinton
Charles CraginApril 12, 1998 - August 3, 1999 (Acting)
August 4, 1999 - May 31, 2001 (PDASD, in charge)
William S. Cohen
Donald H. Rumsfeld
Bill Clinton
George W. Bush
Thomas F. HallOctober 9, 2002 - April 8, 2009Donald H. Rumsfeld
Robert M. Gates
George W. Bush
Barack Obama
Dennis M. McCarthy[8]June 25, 2009 - April 19, 2011Robert M. GatesBarack Obama
David McGinnis (Acting)April 19, 2011 - May 24, 2012Leon PanettaBarack Obama
Jessica L. WrightMay 24, 2012 - December 31, 2012Leon PanettaBarack Obama
Richard O. Wightman, Jr. (Acting)January 1, 2013 - August 2015Chuck HagelBarack Obama
Assistant Secretary of Defense (Manpower and Reserve Affairs)
Todd A. WeilerMay 15, 2016 - January 20, 2017Ashton CarterBarack Obama
Stephanie Barna (Acting)January 20, 2017 - July 30, 2018James MattisDonald Trump
Virginia S. Penrod (Acting)July 31, 2018 - October 22, 2018James MattisDonald Trump
James N. StewartOctober 22, 2018 - December 13, 2019James Mattis
Mark Esper
Donald Trump
Virginia S. Penrod (Acting/Performing the Duties of) December 13, 2019 - May 2, 2022[9] Mark Esper
Lloyd Austin
Donald Trump
Joe Biden
Thomas A. Constable (Performing the Duties of)[10] May 2, 2022 - April 1, 2023 Lloyd Austin Joe Biden
Grier Martin (Performing the Duties of)[11] April 1, 2023 - March 13, 2024 Lloyd Austin Joe Biden
Ronald Keohane[12] March 13, 2024 – January 20, 2025 Lloyd Austin Joe Biden
Tim Dill (Acting) January 20, 2025 - July 18, 2025 Pete Hegseth Donald Trump
Jules W. Hurst III (Acting) July 18, 2025 – August 11, 2025
Bill Fitzhugh (Acting) August 11, 2025 – November 13, 2025
Merylnn Carson (Acting) November 13, 2025 – December 29, 2025
Tim Dill December 29, 2025 – Present
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