See topic.
I've had this idea since I played the Sims 3 - a Law career path.
Basically, your Sim becomes a lawyer; needed traits would be Charismatic and Bookworm (you will spend a lot of time preparing for cases, studying precedents, etc.)
What I further thought of was a career path split: after the fourth level or so, you can choose Criminal Law or Civil Law.
Your sim will also need to befriend the Government - they appoint members of the tenth level of this career (regardless of whether you choose Criminal Law or Civil Law.)
However, both end at the same tenth level: Sim-preme Court Justice.