A native of Cedar Rapids, Iowa, Dr. Jennings earned his undergraduate degree at the University of Iowa. He graduated from the University of Iowa School of Medicine and completed his residency in family practice at the Siouxland Medical Education Foundation in Sioux City. He currently serves as medical director of Harvest Morningside and Countryside nursing homes. Dr. Jennings has been practicing medicine in the Siouxland area since 1980. He and his wife, Kathy, have two sons and one daughter.