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Secretary of Homeland Security

Secretary Kirstjen M. Nielsen

The Secretary of Homeland Security leads the third largest Department of the U.S. government, with a workforce of 229,000 employees and 22 components including TSA, Customs and Border Protection, Immigration and Customs Enforcement, U.S. Citizenship and Immigration Services, FEMA, the Coast Guard, Secret Service, Federal Law Enforcement Training Centers, the National Protection and Programs Directorate, and the Science and Technology Directorate.

Under the Secretary's leadership, DHS is responsible for counterterrorism, cybersecurity, aviation security, border security, port security, maritime security, administration and enforcement of our immigration laws, protection of our national leaders, protection of critical infrastructure, cybersecurity, detection of and protection against chemical, biological and nuclear threats to the homeland, and response to disasters.

Secretary Kirstjen M. Nielsen

Kirstjen M. Nielsen was sworn-in as the sixth Secretary of Homeland Security on December 6, 2017.  Secretary Nielsen is the first former Department of Homeland Security (DHS) employee to become the secretary.

Last Published Date: July 25, 2018

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Aug 16

On August 16, Secretary of Homeland Security Kirstjen M. Nielsen hosted the fifth Federal Commission on School Safety meeting, which focused on best practices for school building security, active shooter training for schools, and school-based threat assessments. The Commission meeting was chaired by Secretary of Education Betsy DeVos and attended by U.S. Attorney General Jeff Sessions and Secretary of Health and Human Services Alex M. Azar II.

Aug 15

The Department of Homeland Security (DHS) hosted the “Tabletop the Vote 2018: DHS’ National Election Cyber Exercise,” a three-day, first-of-its-kind exercise to assist DHS and our federal partners, state and local election officials, and private vendors in identifying best practices and areas for improvement in cyber incident planning, preparedness, identification, response, and recovery. Through tabletop simulation of a realistic scenario, exercise participants discussed and explored potential impacts to voter confidence, voting operations, and the integrity of elections.

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