If your basic uniform is a "Ad-hoc" Space-suit, how heavy is it? How bulky is it? Will it get too hot? Is there integrated cooling systems? I think having a built in "Ad-Hoc" Space-Suit might be over-kill.
And those boots look like Wrestling boots with integrated shin & knee guards.
Similar to the ones that AJ Styles regularly wears.
Here's my thinking; they're basically Partial-(body) Skintight pressure-suit with neckdams and internal glove seals, if needed they can be sealed off in a pinch. The high collar is already a neck-dam. Most of it is due to micro-level engineering, there is a integrated active cooling system inside. The reason I went with this is that I see it as a logical conclusion to fabric tech, being interwoven, sort of light, sort of cool, and works just well enough when needed, but they would be hard pressed, to, say, walk around on the moon with it.
My thoughts on the above:
Engineering & Operations as separate departments makes sense, particularly you don't seem to have a Command/CONN/Bridge Officer, so presumably most of these would sit in "Operations".
Science & Medical as separate departments is fine, I'm not wild about medical as white but DSC provides some basis for that so... *shrugs*... YMMV.
Not sure why you need separate departments for Marines (not my prefered term, but again YMMV), Special Ops, Intelligence and Security/Tactical?
To my mind, regular ship's company in the last would be either sit in OPS or be split between ENG and OPS depending on billet. And the other three -- particularly Spec Ops and Intel -- would be the same department, just split into different sub-sections.
But again, YMMV.
The Marines are a full branch, I do like the dicthomony in Scifi of Navy and Marines,
to an extent. As warfare shifts to space and off world, 'Marines' fulfill most belligerent duties, and when they can't, that's why I have Security/Tactical as a sort of attached defensive force, while Marines are offensive. Sec/Tac sort of guards installations, ships (when they're big enough), and maybe provide support to the Marines when needed.
SpecOps and Intelligence are, IMV, two sides of the same coin, but divided due to internal rivalry and maybe inertia than anything else. Marines of course have their own SpecOps like unit, the Raiders, but that's just another level of rivalry, while Intelligence would be the more 'prim and proper' and 'hands off' - until their agents get dirty, of course.
And aye, most ship's company are Ops, Eng, with a few medics onboard to just make sure everyone is okay.
I didn't even know DSC did white medical? I got it from LOGh and just general old timey scrubs/workwear for medics, hah.