Sims 3 Careers Global Overhaul is a tuning mod which consist of 3 files, each one of them changes the one specified .xml from Sims 3 Gameplay Data. Pls check the mod description. Is Sims 3 Gameplay Data .xml files are not cover each other, so if you change one or two of them correctly ("make tuning mod") it work fine with all other files. That's why you can use 1 or 2 or all 3 files from Sims 3 Careers Global Overhaul at your choice with no problem.
Script mods are not changes .xml files so this kind of mods work fine will all tuning mods.
So if you want to know is files you want to use from Sims 3 Careers Global Overhaul are compatible with some other mod all you need to do is just check that mod description and find which .xml files used in that mod. If that mod is pure script - everything must be fine. If that mod is not used .xml you want to use - everything must be fine. If that mod used the same xml - most probably it will be problem because of massive changes in Sims 3 Careers Global Overhaul.

Haha I laughed way to hard at the mod description. You nailed it!!!

I really like this mod too, and I don't know if they can work together..

pls check this thread first.
posts #11, #27.