Technology powered by experience

Callon Dietz Incorporated has provided land-surveying services to Southwestern Ontario since 1967. Established as the T.O. Callon Company, the firm became Callon Dietz Incorporated in 1991.

Today, Callon Dietz partners on a wide variety of projects including gas line and other above-ground and underground services, highway reconstruction programs, subdivision and condominium surveys, digital terrain modeling and high-tech mapping. While London, Ontario, Canada is our base, we increasingly do business across Ontario and are expanding nationally and internationally.