J. Greg Hanson, Ph.D. is an American computer scientist and software engineer. He previously served as the first Assistant Sergeant at Arms and chief information officer of the United States Senate from June 2003 to January 2008 under Senate Majority Leaders Bill Frist and Harry Reid. He is now President of Excellence in Business, a consulting firm working with clients on business strategy, strategic planning, large business capture and business development, achieving operational excellence, developing solution architectures, application of high technology, and market analysis.