Current National Threat Level is elevated

The threat level in the airline sector is High or Orange. Read more.

Science and Technology Directorate

The Science and Technology (S&T) Directorate is the primary research and development arm of the Department of Homeland Security.


The S&T Directorate's mission is to improve homeland security by providing to customers state-of-the-art technology that helps them achieve their missions. S&T customers include the operating components of the Department, state, local, tribal and territorial emergency responders and officials.

Organization and Leadership

Under Secretary (acting) Brad Buswell is currently leading the S&T Directorate.

The Directorate has three portfolios that address basic research through advanced technology development and transition - spanning six primary divisions that address critical homeland security needs. The Directorate captures requirements for Department technologies through the Capstone Integrated Product Team (IPT) process.



  • The Borders and Maritime Security Division  develops and transitions tools and technologies that improve the security of our nation's borders and waterways, without impeding the flow of commerce and travelers.
  • The Chemical and Biological Division works to increase the nation's preparedness against chemical and biological threats through improved threat awareness, advanced surveillance and detection, and protective countermeasures.
  • The Command, Control, and Interoperability Division develops interoperable communication standards and protocols for emergency responders, cyber security tools for protecting the integrity of the Internet, and automated capabilities to recognize and analyze potential threats.
  • The Explosives Division develops the technical capabilities to detect, interdict, and lessen the impacts of non-nuclear explosives used in terrorist attacks against mass transit, civil aviation, and critical infrastructure.
  • The Human Factors Behavioral Sciences Division applies the social and behavioral sciences to improve detection, analysis, and understanding and response to homeland security threats.
  • The Infrastructure and Geophysical Division focuses on identifying and mitigating the vulnerabilities of the 18 critical infrastructure and key assets that keep our society and economy functioning.

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This page was last reviewed/modified on September 11, 2009.