Larry D. Zimpleman, senior vice president at Principal Financial Group, will take over retirement and investor services operations from Richard L. Prey, executive vice president, who will retire Jan. 31. Mr. Zimpleman now is responsible for global expansion efforts and integrating the domestic pension business with retirement business overseas. He joined the company in 1971 as a part-time actuarial student.
Daniel J. Houston, senior vice president, will be named head of the pension business unit. He is responsible for domestic retirement administration, including Trustar Retirement Services and Professional Pensions.