Runnberg joins from BMO Harris Private Bank, where she served as a vice president.

As wealth management business development officer and vice president she will work with high net worth individuals and families on investment advice and management, trust and estate services and financial planning.

Old Second Bank is part of Old Second National Bank and operates in 25 facilities in the Kane, Kendall, DuPage, DeKalb, LaSalle, Will, and Cook counties in Illinois.