The main student body within SLIIT, comprising student representatives of the Departmental societies in Information Technology, Engineering, and Business Management.
The patrons of the society are the Chancellor and Vise Chancellor of SLIIT. SIS together with the respective student communities, organize various events, maintains decorum and adheres to rules, upholding the good name of the institute.
Currently there are 4 faculty based student communities as Faculty of Computing Student Community (FCSC), Faculty of Engineering Student Community (FESC), Faculty of Buisness Student Community (FBSC) and Faculty of Humanities and Sciences Student Community (FHSSC).
Promotes sports and recreational activities. At SLIIT, students engage in a wide range of sports including cricket, rugby, volleyball, tennis, table tennis, badminton, chess, carom and karate. The Malabe campus has excellent indoor and outdoor sports facilities. These include a large playground, a tennis court, a basketball court, indoor table tennis, carom and a well- equipped gymnasium.
|Name of Club / Society||Name of Staff Advisor||Social Media link|
|SLIIT Gavel Club||Ms. Anjalie Gamage||https://www.facebook.com/SLIITGavelClub|
|English Literary Association||Dr. Manouri Jayasinghe|
|Rotaract Club of SLIIT||Dr. Kalpani Manathunga||https://www.facebook.com/RotaractSLIIT|
|Leo Club of SLIIT||Dr. Anuradha Jayakody||https://www.facebook.com/SLIITLeo|
|AIESEC at SLIIT||Mr.Prasanna Sumathipala||https://www.facebook.com/AIESECinSLIITiGCDP|
|IET Student Chapter at SLIIT||Dr.Anuradha Jayakody||https://www.facebook.com/ietoncampussliit|
|IEEE Student Branch of SLIIT||Prof. Pradeep Abeygunawardana||https://www.facebook.com/ieee.sliit|
|Engineering Research & Innovation Club (ERIC)||https://www.facebook.com/SLIITERIC|
|SEDS SLIIT(Students for the Exploration & Development of Space SLIIT Chapter)||https://www.facebook.com/SEDS.SLIIT|
|Highway Engineering society||https://www.facebook.com/SLIIT.HES|
|Cyber Security Community of SLIIT||https://www.facebook.com/sliit.cscs|
|SLIIT ISACA Student Group||https://www.facebook.com/isacasliit|
|SLIIT Free & Open-source Software Community||https://www.facebook.com/sliitfoss|
|Software Engineering Student Community||https://www.facebook.com/sliitsecommunity|
|SLIIT Gaming Community||https://www.facebook.com/sliitgc|
|MS Club of SLIIT||https://www.facebook.com/msclubsliit|
|Faculty of Computing Media Unit||https://www.facebook.com/sliit.fcmu|
|SBS Media Club||https://www.facebook.com/sliitfobmediaunit|
|Faculty of Engineering Media Club||https://www.facebook.com/FEmediaclub|