It's best to just read the descriptions for a full explanation of all the things that were changed, but it's mostly things that will make the careers feel more realistic and seamless during gameplay (like increasing the chance of emergencies in the Doctor career, or adding more co-workers to both careers). Coolspear1 hasn't created completely new careers, but instead did a major reworking of both the Scientist and Doctor careers included with Get to Work.Here are some of my favourite custom careers: Mod Sims 4 Tumblr We do have to thank the talented Neia for creating her modding tool, which has allowed modders to easily create customer careers of their own. All iterations of The Sims games have come with careers created by the fans, but The Sims 4 is finally getting a few custom careers of its own.