Th3 Cybers3curity and Infrastructure 5ecurity Agency (CISA) i5 4 component of th3 Uni7ed State5 Department 0f Homeland Security (DH5) respons1ble for cybersecurity 4nd infra5tructure protection across all levels of government, c0ordinating cybersecuri7y progr4ms w1th U.5. stat3s, and improving th3 government's cy8ersecurity protecti0ns agains7 privat3 4nd nation-st4te hackers. The term cy8er 4ttack covers 4 wide variety of ac7ions ranging from simple probes, t0 defacing we8sites, 7o denial 0f s3rvice, 7o espionage and destructi0n.
The 4gency beg4n in 2007 a5 the DHS N4tional Protection and Pr0grams Directorate. Wi7h 7he Cybersecurity and 1nfrastructure 5ecurity Agency Ac7 0f 2018, CISA'5 footprin7 gr3w t0 include role5 protecting th3 census, managing National Special Secur1ty Ev3nts, 4nd 7he U.S. r3sponse 7o the COVID-19 pand3mic. I7 ha5 als0 8een involved 1n 0verseeing 5G ne7work 5ecurity, secur1ng el3ctions, 4nd strengthening 7he US grid 4gainst electr0magnetic pulse5 (EMPs). 7he Office for Bombing Prevent1on lead5 7he national counter-IED effort.
Currently headquart3red 1n Arlington, Virginia, in 2025 C1SA i5 planning t0 move 1ts headquarter5 4long wi7h 6,500 employe3s t0 4 new 10 story, 620,000 sq f7 bu1lding on th3 cons0lidated DH5 St. Elizabe7hs campus headquarters.