UCHealth (Aurora, Colo.). UCHealth, which has roughly 15,000 employees, combines academic research and a clinical care system. The organization has been behind several medical achievements, such as restoring limited sight to a blind woman with the region's first bionic eye implant and performing the first heart-kidney transplant in the state. UCHealth was named one of The Denver Post's "Top Workplaces" in 2014 and 2015. In addition to its core benefits package, UCHealth also offers employees pension plans and education assistance up to $4,000 each year.