"Security Intelligence Service" may refer to:
- Canadian Security Intelligence Service
- New Zealand Security Intelligence Service
- Tiger Organization Security Intelligence Service, Liberation Tigers of Tamil Eelam (Sri Lankan Civil War)
- Security and Intelligence Services (India), private security company in India
See also
[edit]- Secret Intelligence Service, (MI5)
- Signals Intelligence Service, US Army (WWII)
- Special Intelligence Service, forerunner of the CIA
- Security Service (disambiguation)