I don't know enough about exAscoteer2's point to comment but transport, ISTAR. and tanker aircrew officers are absent from the list of CsAS whose careers started after WW2. The research for paper I referred to was by its nature only able to concentrate one particular group and written by an FJ pilot; I assume he naturally looked at the officer career path he had most experience of.
The last CAS with experience of multi-engined fixed wing aircraft with a big crew was MRAF Lord Craig and he was an FJ pilot until he joined 35 as a flight commander. The last one whose career started in them was MRAF Sir Michael Beetham (who left the office just over 40 years ago and was originally a WW2 RAFVR officer). I am deliberately excluding Canberra/Wessex pilot MRAF Sir Peter Harding as I assume exA's point wouldn't apply.