U.S. flag

An official website of the United States government

Government Website

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Safely connect using HTTPS

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

  1. Home
  2. About DHS
  3. Site Links
  4. Keywords
  5. National Security

National Security

Last Updated: May 2, 2022 | Fact Sheets

Fact Sheet: DHS Internal Working Group Protects Free Speech Other Fundamental Rights When Addressing Disinformation That Threatens the Security of the United States

The U.S. Department of Homeland Security is charged with safeguarding the United States against threats to its security, including threats exacerbated by disinformation.

Last Updated: November 1, 2021 | Blog

Protecting Critical Infrastructure Is a Top S&T Priority

Throughout November, S&T will observe Infrastructure Security Month, a public-awareness campaign sponsored by our colleagues at CISA to safeguard the nation’s infrastructure.

Last Updated: July 12, 2021 | Blog

Enhancing Resilience and Innovation Equity

Join us for Series 2 of our four-part Whole-of-Government R&D Showcase, focusing on Building Resilience and Innovation Equity.

Last Updated: June 28, 2021 | Blog

Forging Cybersecurity Bonds through Global Fellowship

S&T is sending its first-ever Embassy Science Fellow to Seoul to work on projects that have positive impacts on national security, economic development, and international collaboration.

Last Updated: January 4, 2021 | Publication

DHS COVID R&D Impacts: SXSW Overview

In the race to get the country back on track in the current COVID-19 era, the Department of Homeland Security Science and Technology Directorate (S&T) is leading a whole-of-government approach to build public-private innovation teams that incentivize and lower the risk for industry to co-invest in solutions to address nationwide problems and build resilience capacity.

Last Updated: April 28, 2020 | Publication

DHS Implementation Plan and Annual Reports for the U.S. Strategy on Women, Peace, and Security

Around the world, conflict and disasters adversely and disproportionately affect women and girls, yet women remain under-represented in efforts to prevent and resolve conflict, and in post-conflict peace-building or recovery efforts. Research has shown that peace negotiations are more likely to succeed, and result in lasting stability, when women participate.

Last Updated: September 3, 2019 | Publication

Security

Information on policies, procedures, and general reference information related to security programs at DHS. This information is provided to aid DHS’s industry partners, as well as the general public, in navigating the security landscape when doing business with or applying for employment with DHS.

Last Updated: June 5, 2019 | Publication

S&T CREATE Fact Sheet

CREATE’s mission is to improve the Nation’s security through the development of advanced models and tools for the evaluation of the risks, costs, and consequences of terrorism and to guide economically viable investments in homeland security.

Last Updated: October 9, 2018 | Site Page

DHS Personnel Security Info & Reference Materials

Information on policies, procedures, and general reference information related to personnel security at DHS. This information is provided to aid DHS’s industry partners, as well as the general public, in navigating the personnel security landscape when doing business with DHS.

Last Updated: October 5, 2018 | Site Page

Office of the Chief Security Officer

The Office of the Chief Security Officer (OCSO) is a DHS Headquarters element located within the Management Directorate. The OCSO Mission is to deliver enterprise wide security solutions to protect the Department's people, information and resources against constant evolving threats.