Funny that you should ask this now, I just finished reading X-Wing: Mercy Kill which deals with a Mathematician feeling out of place.
A Gamorrean male named Voort "Piggy" saBinring is a professor of mathematics at a University on some planet.
"I'm a math instructor now. I take mathematical concepts, I shape them into spikes, and I spend months hammering them into the heads of students who's much rather be involved in amorous pursuits or playing games,..." So there are for sure professors and students of mathematics.
So there is a need for living professors rather than just having droids do the teaching, "'A teacher droid can do everything you're doing for your students...' 'A droid can't instill into them a love for mathematics'". Chapter 2 page 30ish.
As for real world job applications for mathematicians, especially with minors in comp sci., I believe there would be even more opportunities, not less. Don't underestimate the practical applications of Mathematics. I'm a computer Engineer, so not that different from your educational background, and I see math EVERYWHERE. There's not a day that goes by where I don't use calculus, or at least some form of math, in technical designs. We often use mathematicians as consultants for some of the more complex problems. IMO in a world full of starships, droids, and battle stations, mathematicians would never be out of the job.
There are also countless examples of scientists/mathematicians in many SW video games. They usually design advanced technologies however.
As a side note, Engineers often work side by side with mathematicians and other scientists in the real world.