It looks similar, but it's not the same model.
Engineers have this one (not sure if this is the exact model pack but this does contain the model for sure): https://steamcommunity.com/sharedfiles/filedetails/?id=1664236076&searchtext=black+mesa
Engineers have more of a bright orange jumpsuit with russian text on the back, and slightly brighter orange sleeves. The proposed pack in this thread has a darker tan jumpsuit with orange sleeves. Also different helmets which look way better.
I'd honestly be down to take this pack and use the orange suit model in it to replace the current engineer/low command skin, and let the non-command technicians use the green jumpsuit skin. This could be a good compromise for the 66MB filesize if we were to remove the command playermodel in favor of this pack / using the orange suit skin from this pack. This would also be nice because Tech command would stop getting lit up on sight by MTF/Security forces because of our passing resemblance to D class. (The tan/orange skin from the proposed pack looks a little more visually distinct from a D class imo)
Either that or we'd probably let the senior techs use the orange skin while all other techs use the green one, if we kept the current command engineer skin in addition to adding the new pack.