I have 11 mths left in the forces of 22. I think you have to choose yourself, but the RONIN cse's, Pheonix, I'm personally doing the Longmoor cse in Mar,Longmoor Security - Close Protection, Security Training and Risk Management then will research an FPOS First person on scene medic cse, probably a VIPER cse VIPER Course - Prometheus Medical Ltd Courses ,Herefordshire
There's alot of talk of offshore medic cse's, but basically a CP cse backed up by lots of medical/first aid cse's.
There's heaps of paperwork to do for ELCAS etc, so do it early, thers's also lots of prep before going on the cse's.
Regards