Employees at the Department of Homeland Security's Cybersecurity and Infrastructure Security Agency, or CISA, have been given deferred resignation offers as part of the Trump administration's broader efforts to shrink the federal government. CISA plays a key role in defending critical U.S. infrastructure. Jim Watson/AFP via Getty Images hide caption toggle caption Jim Watson/AFP via Getty Images Employees at the Department of Homeland Security's Cybersecurity and Infrastructure Security Agency, ...