Cunningham, who has also previously worked at Vizeum and Rapp, takes over the running of the 35-strong department and will report to the deputy managing director, Richard Morris.
Morris said: "In Ben, we are pleased we have found someone with an outstanding pedigree, equally adept in direct marketing and digital performance media."
Cunningham added: "My aim is to develop the very best-practice direct solutions for our clients, especially at this exciting time with digital offering greater data-driven opportunities."
McKibbin joins the executive management team at iProspect and will take charge of a new strategy function to ensure the company is using technology and data effectively. He will report to iProspect's managing director, Ben Wood.