Security Unconventional Warfare (SUW)

Security Unconventional Warfare is an active posture where small, specialized cells work ahead of the threat rather than behind it. These teams hunt reconnaissance, close attack paths before anyone uses them, and burn adversary time until continuing the attack no longer makes sense. It amounts to security counterinsurgency: small teams built the way special operations units approach irregular warfare, carrying the fight back to the attacker rather than waiting behind a perimeter.

You can read more here, and get more information for SUW implementation.