Retired Bankers Trust CEO Suku Radia is returning to his alma mater, Iowa State University, as executive-in-residence with the Debbie and Jerry Ivy College of Business as it launches an executive MBA program focused on food, agriculture and biosystems. Radia will be instrumental in planning and leading a high-quality speaker series for those enrolled, the college said in a release. “Having Suku on our team will take this program to the highest possible level,” said David Spalding, dean of the business college. The 21-month executive MBA is offered in partnership with the College of Agriculture and Life Sciences. Radia, a 1974 ISU graduate in accounting, has also been a member of the business college’s advisory council since 2014.