The Australian Secret Intelligence Service (ASIS) is the Australian government intelligence agency responsible for collecting foreign intelligence, undertaking counter-intelligence activities, and cooperation with other intelligence agencies overseas.
ASIS sent its agents on missions all around the world, going as far as the Chinese island of Lian Yu. It provided its agents with specific suits of armor, some of which included a distinct operational equivalent of balaclava, used by ASIS operatives to protect their identities during secret operations. 
- Wade DeForge (regional head)
- Guggino (Analytics Department head)
- Digger Harkness (presumed deceased)
- Matt Nakauchi (Analytics Department technician)
- Joe Wilson
- ASIS unit
- "Betrayal" (mentioned)
- "Suicide Squad" (mentioned)
- "The Brave and the Bold" (mentioned)
Behind the scenes
- In the Arrowverse, the organisation's abbreviation is spelt out, "Ay-Es-Eye-Es" until season 6. In real-world Australian media and conversation, it is pronounced as a word, to rhyme with "basis".