The National Security Guard, commonly known as Black Cats, is a counter-terrorism unit of the Indian government managed under the Ministry of Home Affairs.

A Marine Security Guard, also known as a Marine Embassy Guard, is a member of the Marine Corps Embassy Security Group (formerly Marine Security Guard Battalion),Marine Corps Embassy Security Group a brigade-sized organization of the United States Marine Corps whose detachments provide security at American embassies, consulates, and other official U.S. government offices, such as the United States Mission to NATO in Brussels, Belgium.

a civilian organisation of the Ministry of Defence that provides armed security at military establishments in Northern Ireland.