US employees: 29,818
Last year's worldwide job growth: 5 percent
Most common job/Avg. salary for job: Manager/Supervisor/$88,007
PricewaterhouseCoopers, the largest accounting firm in the world, is also the largest company in Massachusetts to make Fortune's list, with 2,122 employees at its Boston office. Hiring at PricewaterhouseCoopers is extremely competitive, but the company is known for its benefits, too, including breaks on cellphone bills.