National Security Corps (Royal Canadian Gendarmerie)

The National Security Corps (RCG–NSC; French: Corps de la Sécurité nationale, GRC–CSN) is the section (corps) of the Royal Canadian Gendarmerie (RCG) concerned with major law enforcement operations within the Canadian Republic's civilian population, both domestically and abroad. It handles law enforcement operations and investigations which fall under federal jurisdiction, typically only those which are designated extremely serious and which provide the most immediate and credible threat(s) to Canada's national security or the security of senior members of the Canadian federal government.

The National Security Corps also assists the RCMP, provincial police forces, and local police forces (county constabularies) with public order and security at major national and international events deemed at-risk. The corps is also responsible for providing security details to the President and Prime Minister of Canada and other senior federal government officials, as well as visiting VIPs like diplomats and other international delegates. One of its most important responsibilities is ensuring the the safety of a venue prior to the commencement of a major event, and may call upon other RCG corps (including non-civilian corps) to assist in this role under its supervision if deemed necessary (such as the Ammunition and Explosives Corps in the event of a bomb threat or the Rapid Response Corps in the event of a large-scale shooting attack).

The National Security Corps has its headquarters at the RCG Armoury in Ottawa, and has a total of 75,433 enlisted and commissioned personnel and 3340 civilian personnel, the latter of whom are technically Department of National Defence (DND) employees. According to the National Police Act, in peacetime the National Security Corps comes under the jurisdiction of Public Security Canada, while during war it comes under DND jurisdiction. The commanding officer of the National Security Corps is Lieutenant-General Anthony B. Simmons.