R. Marshall Engelbeck retired as a Colonel after twenty-eight years of active service as an Air Force logistician. During this time he developed his contracting expertise by working directly with government contracts for eight years. After retiring as Vice Commander of the Air Force Contract Management Division, Marshall spent ten years as a Senior Contract and Proposal Manager with the Defense Communications Division of Rockwell-Collins in Richardson, Texas. During this time he also taught Management of Government Contracts and Contemporary Contracting at the University of Dallas Graduate School of Management.