ISIN deals with internal criminal matters in UNSC space, be that smuggling of contraband, cybersecurity, counterterrorism, counterintelligence and more. They are the highest level civilian policing force in the UNSC, with an agent having the same jurisdiction over a suspect as a member of the military police or intelligence agent. The ISIN generally work in Core to Mid systems of the UNSC, working with local enforcement agencies to take down criminal activities from arms trade to human trafficking. They are also a member of the Central Departments of Civilian and Military Intelligence and Security (CDCMIS or the 'Big Six'), often working closely with its sister civilian agency, the Central Intelligence Agency (CIA)