Boss

Background
Collect 50 Federal Agent to unlock the Uncle Sam Achievements

Boss covers levels 100+.

Each job after the first is unlocked in 5 level intervals:

Buy Off a Federal Agent is unlocked at level 105.

Make a Deal with the Mexican Cartel is unlocked at level 110.

Take Control of a Casino is unlocked at level 130.

Travel to the Old Country is unlocked at level 135.

Job Tier Mastery
Upon mastering the Boss tier 3 times, you will be rewarded with a Golden Throne which gives you a 2x energy regenerated.

You will need the following loot items to completely master this tier:

Blackmail Photos: 368

Illegal Transaction Records: 109

Energy
Job Mastery Level 1 = 10,939 Energy

Job Mastery Level 2 = 15,708 Energy

Job Mastery Level 3 = 28,950 Energy

Total Energy for Job Mastery = 55,597 Energy

How to Read the Tables
It's very simple. The first 3 rows are things you receive from the job (Payout, Experience,Chance to Loot), the next 3 are things you must have in order to do the job (Energy and Items), and the last 3 simply list how much percentage towards mastery you gain.