Most of us (engineers of any kind) learn quite lot of maths during uni, and most of us forget 90% of that as it's not needed in most jobs, which is a shame.

The thing I have needed all the time is statistics and prob. theory, that keeps coming up literally everywhere. Calculus - not so much. If you need something, you can always re-learn it quickly. (For example, I learned quite a lot of linear algebra, but haven't used it for ~10 years, so when I had to write some 3D gfx/shader code, I had to spend like two days on quaternions, etc.)