After graduating from the University of North Texas, John Zimmerer worked for a large painting contractor as an Estimator, Project Manager and Vice President from 1985-1990. He estimated and ran numerous projects for schools, hospitals, hotels, and office buildings with several projects amounting over $1,000,000. From 1990 to present he has served as President of Jonsco, Inc. involved in estimating, project managing and field supervision. He believes the key to Jonsco success has been putting the customer first through outstanding quality and lasting results.