Top 10 rankings: No. 4 for training, No. 4 for retention Skills development is a watchword for this Chicago-based alliance of nonprofit academic medical centers. UHC pays for subscriptions to online training services, reimburses IT staffers for standard tech certifications, and provides hands-on learning opportunities through its ongoing acquisition and integration of leading-edge technologies. Perks include the option to work from home up to two days a week, company-paid flu shots and fitness club memberships, and health plan discounts for workers who participate in wellness initiatives.