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 with small teams built the way special operations units approach irregular warfare, carrying the fight back to the attacker rather than waiting behind a perimeter.
Head over to the Security Brutalist Blog to read more about SUW, get the book to go deeper into the fundamentals, and visit Black Arrows for help with SUW implementation.