Melvin Miller, executive vice president and chief investment officer at Iowa-based Heartland Financial USA, is due to retire on 1 August.

Miller initially joined Heartland and its Dubuque Bank and Trust subsidiary in 1984 as an investment officer.

Until 2008, he supervised the investment management branch of the bank’s wealth management group, and also previously headed the investment department. During his time there, he is credited with spearheading a social responsibility investment policy for the bank’s wealth management group.

Heartland said in a statement that it will consider both internal and external candidates to replace Miller.

The bank has a presence in Iowa, Illinois, Wisconsin, New Mexico, Arizona, Montana, Colorado and Minnesota.