Enable the testingcheatsenabled true code. If your Sim does not have a profession yet, choose one. Once it does, go to the "Work" tab in the dashboard. You will see a bar for your job progress. Drag the bar all the way to the end. Each time you do, you will advance one level in that profession requiring less than 30 seconds to reach level 10. Note: This only works with the professions and not the regular jobs.