In the position, Spelbring was responsible for the agriculture and natural resources program area and the community development program area.
He also helped with 4-H Youth Program activities and county fairs in both counties.
A retirement reception will take place Sunday, Oct. 7, from 2-4 p.m., in the Parke County Extension Office Meeting Room at the 4-H Fairgrounds north of Rockville.
The public is invited to attend the event.
Spelbring is a native of Clay County, having been raised near the Poland area.
He and his wife Linda live in Rockville.