Fortune 1000 rank: 520Best Companies rank: 54No. of U.S. employees:
15,674Most common salaried job:
Project ManagerAvg. pay in that job:
$100,998What makes it so great?
Employees own all the stock in this engineering-construction firm, which does everything from decommission nuclear plants to help London gear up for the 2012 Olympics. NEXT: Adobe Systems