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Derek Leiman has extensive experience in the field of geomatics and project estimation, currently serving as Chief Estimator at Explore Inc. since June 2008, where responsibilities also include roles as Crew Manager and Pipeline Integrity Coordinator. Prior to this position, Derek Leiman worked at Midwest Surveys Inc. from September 1990 to May 2008, holding the title of Senior Crew Chief and Geomatics Technician.