OASD(NCB) Organization

ASD(NCB) Organization Chemical and Biological Defense Defense Threat Reduction Agency Nuclear Matters Threat Reduction and Arms Control


Chemical and Biological Defense (CBD)

Chemical and Biological Defense oversees the development of Chemical, Biological, Radiological and Nuclear (CBRN) defense capabilities to protect national interests at home and abroad.  The OASD(NCB/CBD) ensures the integration of DoD efforts related to science & technology, advanced development, test and evaluation, and the CBD Program Objective Memorandum (POM).

The office is currently transitioning its focus towards broader countering weapons of mass destruction (WMD) responsibilities.  The OASD(NCB/CBD) serves as a focal point to ensure DoD support for homeland defense and overseas contingency operations against existing and emerging CBRN threats.

CBD website



Defense Threat Reduction Agency (DTRA)

DTRA is the U.S. Department of Defense’s official Combat Support Agency for countering weapons of mass destruction (CWMD). DTRA employees are WMD subject matter experts, with skillsets and abilities that address the entire spectrum of chemical, biological, radiological, nuclear and high yield explosive threats. DTRA’s programs include basic science research and development, operational support to U.S. warfighters on the front line, and in-house capabilities to anticipate and mitigate future threats long before they have a chance to harm the United States and our allies. The U.S. Strategic Command Center for Combating Weapons of Mass Destruction synchronizes combating weapons of mass destruction efforts across the U.S. military’s geographic commands and leverages the people, programs and interagency relationships of DTRA at a strategic level. DTRA and the SCC-WMD work with the military services, other elements of the United States government, and countries across the planet on counterproliferation, nonproliferation and WMD reduction issues with one goal in mind: Making the World Safer.

DTRA website



Nuclear Matters (NM)

The Deputy Assistant Secretary of Defense for Nuclear Matters (DASD(NM)) fulfills the nuclear weapons roles, responsibilities, and functions for the Assistant Secretary of Defense for Nuclear, Chemical, and Biological Defense Programs (ASD(NCB)).

Nuclear Matters serves as the focal point for DoD activities and initiatives related to the dual missions of sustaining a safe, secure, and effective nuclear deterrent and countering the threat from nuclear terrorism and nuclear proliferation. In this capacity, the OASD(NCB/NM) also serves as a primary point of contact for Congress, the interagency, and the public. The office is comprised of representatives from all areas of the nuclear community, to include the U.S. Navy, the U.S. Air Force, the National Guard Bureau, the United States Nuclear Command and Control Systems Support Staff, the Defense Threat Reduction Agency, the Department of Energy, the National Nuclear Security Agency, Los Alamos National Laboratory, Lawrence Livermore National Laboratory, Sandia National Laboratories, the Kansas City Plant, and the National Security Agency.

NM website



Threat Reduction and Arms Control (TRAC)

The Deputy Assistant Secretary of Defense for Threat Reduction and Arms Control (DASD(TRAC)) is the principal advisor to the ASD(NCB) for acquisition oversight, implementation, and compliance with nuclear, biological, and chemical treaties; cooperative threat reduction; chemical demilitarization programs; and building global partner capacity to counter weapons of mass destruction.  The DASD(TRAC) exercises oversight of the Defense Threat Reduction Agency-executed Cooperative Threat Reduction Program and provides oversight of the Chemical Demilitarization Program.  Additionally, the DASD(TRAC) provides oversight of implementation and compliance with existing and prospective nuclear, biological, and chemical arms control agreements in accordance with DoDD 2060.1, Implementation of, and Compliance with, Arms Control Agreements; integrates combating weapons of mass destruction programs; and assists the ASD(NCB) as Executive Secretary of the Counterproliferation Program Review Committee (CPRC) and Chair of the Standing Committee of the CPRC.

More Information on TRAC