According to a description provided by the Office of the USD, the ASD shall:
Conduct and manage day-to-day, multilateral, regional, and bilateral defense relations with all foreign governments in assigned areas of responsibility.
Develop regional security and defense strategy and policy, provide advice, and issue guidance to translate global and functional policies into regional-specific country strategies, and oversee their implementation in coordination with cognizant DoD officials.
For countries in assigned areas of responsibility, develop, coordinate, and oversee the implementation of:
* Defense security policy and management of defense and military relations
* Policy, plans, and activities, as well as uses of DoD resources engaged in encouraging the development of military capabilities, constitutional democracy and respect for human rights, including civilian control of the military, institutionalizing an appropriate role for the military in a constitutional democracy, and encouraging the development of standards of military professionalism that promote respect for elected civilian authorities and human rights.
* DoD policy and recommendations concerning security cooperation programs and organizations, foreign military sales, military education and training, and other missions pertaining to security cooperation program relationships.
Provide policy guidance and oversight to the Defense Advisor, U.S. Mission to NATO, and Representative of the Secretary of Defense Representative to the OSCE on behalf of the Under Secretary of Defense for Policy. Promote coordination, cooperation, and joint planning on nuclear policy and strategy with NATO Allies, in coordination with the Assistant Secretary of Defense for Special Operations/Low Intensity Conflict and Interdependent Capabilities.
Support the NATO Nuclear Planning Group and its subordinate body, the High Level Group and chair the High Level Group.
Represent the Under Secretary of Defense for Policy and the Secretary of Defense in interagency policy deliberations and international negotiations dealing with assigned areas of responsibility.
Monitor and provide policy recommendations related to the conduct of U.S. military operations in the countries or regions of focus or on the participation of such countries in operations outside of the region.
Perform such other functions as the Under Secretary of Defense for Policy or the Secretary of Defense may prescribe.
Office holders
The table below includes both the various titles of this post over time, as well as all the holders of those offices.
Structure
This office can trace its roots back to the early days of the modern national security establishment. It was created in 1949, two years after the National Security Act established the Department of Defense. The ASD is supported by four Deputy Assistant Secretaries, each with coverage of a different region. The DASDs manage "principal directors" who in turn oversee "country directors" with more narrow geographic portfolios:
The ASD also oversees the DoD representative in the U.S. Mission to NATO, and the DoD representative to the Organization for Security and Co-operation in Europe. DASDs are appointed by the Secretary of Defense. Some are appointed from civilian life, while others are career defense officials. Once at the DASD level, the latter are considered a part of the DoD Senior Executive Service. The ASD is also supported by a Principal Deputy, or PDASD, who helps manage the day-to-day operations of the four DASDs and the NATO rep.
Principal Deputy Assistant Secretaries for International Security Affairs
