Claus Breede served as chief technician of the West Asian Department of the Royal Ontario Museum, where he worked on a number of field expeditions and architectural projects as artist, supervisor and photographer. Excavations in which he participated included work in Belize, the Virgin Islands, Northern Ontario, Egypt, and Iran. Breede also served as Director of the Bruce County Museum while founding the Canadian Cultural Resource Consultants, Inc., before continuing museological work as curator of The Royal Canadian Regiment Museum.