Overview. Superior Air-Ground Ambulance Service of Wisconsin, Inc. Openings in multiple locations : Oshkosh, Kaukauna, Menomonee Falls, Green Bay, Fitchburg, Milwaukee, Janesville, and Elkhorn. History of the Company : Superior Ambulance Service started in 1959 with one ambulance and today is the largest independent, locally owned, and operated emergency medical services provider in the Midwest. Superior employs more than 2,500 licensed EMT, Para...