If you're working with a sim who got an A in high school, the job components of the aspiration (level 3 in 1 job, etc.) will complete as soon as the sim gets a job, with 2 exceptions -- Athletic and Business. Both show the sim at level 3 of a job, but that doesn't affect the Renaissance Sim aspiration. The careers that came with the base game do, however.
Also, my experience with the GTW careers is that sims who got an A as teens only start at level 2 of the career.