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Leader of federal cyber defense programs resigns from CISA

Shelly Hartsook at an Elastic Events summit in 2025. (Elastic Events / LinkedIn)

By Justin Doubleday

The Cybersecurity and Infrastructure Security Agency is losing another key leader who has played a critical role in spearheading governmentwide cyber defenses.

Shelly Hartsook, acting associate director in CISA’s cybersecurity division, announced her resignation today, two sources confirmed to Federal News Network. The sources, who requested anonymity because they were not authorized to speak publicly, said Hartsook’s departure was voluntary, though it comes at an uncertain time for the cyber defense agency. One of the sources said Hartsook’s last day at CISA will be March 6.

Hartsook did not respond to a request for comment sent to her email or LinkedIn page.

Read more at Federal News Network

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