They just need to adapt the ideas and suit diagrams for the marines in warhammer 40k.
I mean that suit is a little close. Not sure of the CPU and if it monitors body functions and acts as its own medic. Does it have feeding abilities and waste recycling. Looks like some enhanced bionics which is good though they would really need it in arms to so they can have adaptable arm equipment. Better visor capabilities for assorted full spectrum's of visions. Closed system with environmental scrubbing, then of course some very long term power supply. I mean if you are going to do it you may as well be able to keep them in the suit for weeks if not months at a time.