SIS Ltd. engages in the provision of security systems and solutions. It operates through the following segments: Security Services India, Security Services International, and Facility Management. The Security Services India segment is involved in the guarding, electronic security and home alarm monitoring, and response services. The Security Services International segment refers to the guarding, mobile patrols, emergency medical response and rescue, loss prevention, and allied services. The Facility Management segment focuses on the housekeeping, cleaning, facility operation and management, and pest control services. The company was founded by Ravindra Kishore Sinha in 1985 and is headquartered in New Delhi, India.