Brian Harrell, the Assistant Secretary of Infrastructure Protection at DHS CISA, has submitted his resignation to the President. The former director of Electricity ISAC, Harrel joined the agency in 2018, where he oversaw the transition of multiple critical infrastructure protection services provided by DHS underneath the umbrella of the Cybersecurity and Infrastructure Security Agency after the signing of the CISA Act. In his resignation letter, Harrell praised the agency’s work providing assistance to the private sector during multiple incidents, including the COVID-19 pandemic. CISA Deputy Assistant Director Steve Harris will be the acting leader at CISA until a replacement for Harrell is confirmed. Read more at Homeland Security Today and CyberScoop.