The IMT Group announced that Sean Kennedy has been selected as the company's president and CEO, effective April 17. He succeeds Richard Keith, who has retired after 36 years with the company, including the past 10 years as president and CEO.  Kennedy, 44, began his insurance career with IMT in 1993 and has more than 21 years of experience in the insurance industry. He served in an actuarial role as IMT's vice president of research and development for seven years before being named executive vice president two years ago. He has degrees in mathematics and economics from Simpson College. The West Des Moines-based insurance group consists of IMT Insurance Co. and Wadena Insurance Co., and offers commercial and individual property/casualty insurance in six Midwestern states.