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Secretary Kirstjen Nielsen

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Resignation Letter of Secretary Nielsen

On April 7, 2019, Secretary of Homeland Security Kirstjen M. Nielsen offered her resignation to President Trump.

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Kirstjen M. Nielsen, Secretary of Homeland Security, 2017 - 2019

Kirstjen Michele Nielsen was sworn in on December 6, 2017 as the sixth Secretary of Homeland Security and served until April 10, 2019. She previously served as White House Deputy Chief of Staff. Secretary Nielsen joined the Trump administration in January 2017 as Chief of Staff to then-Secretary of Homeland Security, John Kelly. In that position, she was responsible for advising the Secretary on all operational, policy, and legal matters, including counterterrorism, cybersecurity, and border security.

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Secretaries of Homeland Security

List of current and former Secretaries of the Department of Homeland Security, their dates of service, and links to their biographies.