With respect mate the question is irrelevant. It will not make a blind bit of difference who holds the role because no one is capable of producing a more beneficial outcome for HMF until there is a Cyclops shaped hole at No 10.
Short of a pleasant surprise his anti-Forces crusade will continue for a few years yet, as evidenced - if true - by the passing over of General Dannatt. Still, I like surprises
Since the word 'job' does seem to imply that he actually does some work/makes a positive contribution to the running of things might not 'position' be a better replacement? Sinecure might be more apt but I guess I'm in a generous mood this afternoon.
That said, it's Brown who makes the appointments and, clearly, the operational decisions. The question might then be does Hutton have the testicles and inclination to stand his (the military's) corner or would he just be a different mouthpiece?