University of Michigan Health System (Ann Arbor, Mich.). With roughly 26,000 employees, the University of Michigan Health System saw more than 2 million patient clinic visits, more than 54,000 surgical cases and almost 50,000 hospital discharges in 2016. The health system was recognized as one of Metropolitan Detroit's 2015 "101 Best and Brightest Companies to Work For." The health system offers employees on-site fitness programs and nutrition consultations, and in addition to a flexible benefits program, UMHS has a two-to-one matching retirement plan.