I find it strange that the anti-cheating position is no longer accepting applications as of 8 months ago then?
Acorn moved last year from Anti-cheating to community manager, no replacement or another addition just you and Tyran on 2 games is not enough.
Linkedin, glassdoor and the official jagex page no sign of open positions in anti-cheating anymore.
The anti-cheating team is not part of the engine team. Positions in the anti-cheating team are typically filled internally because it's easier to ensure that candidates are trustworthy.
There are currently 6 mods in the anti-cheating team. Myself and Tyran are full time anti-cheating and the others are auxiliary members, who are split between anti-cheating and support roles.