Idk exactly what you mean by "science" in this context
But for math and CS:
I 'need' math maybe once every few months to get through a white paper so i can build something implementing the concepts. Usually no more than some algebra, but some light calculus every now and then.
Light statistics are pretty much constant. Real simple stuff though - ntiles, std, etc, but i have found excuses to do some modeling a few times
Comp Sci stuff: im not a software dev, so none is needed. But i am almost always working on a python script to automate something analyze a larger dataset... this is usually something i do to be better at my job, but it isnt required.