Come to think of it, the "Medics" could handle the biological, exobiology & Alien interraction sciences, while the "Engineers" could build basic stuff, disassemble alien technology and design/build hybrid advances.
I know it was a game abstraction in XCOM but it never really made sense to me that the same scientists could perform autopsy/ and design a starship.
In fact, Biology & Engineering are two vastly different domains requiring a completely different career. Sometimes you can combine the two for new & unique applications, but that is done using mixed teams of specialists.
I know it might be far too late in the game to change that (and I'm cool with it if it remains as it is), but it would make sense to me if Biologists and Engineers were two different kinds of specialists that could work on different (or common) research/production projects.