International Investigators Network (Pvt) Ltd. (IIN) was established in 2002 with the view of filling the need for a specialized investigation outfit, with investigations as its sole activity. Prior to 2002, IIN was the investigation arm of Vigilant Security & Investigation Services (Pvt) Ltd., one of the pioneering security & investigation companies in Sri Lanka having established itself in 1973. IIN is also an ISO 9001:2015 certified company.