Commercial Roofing Service Technician Summary: You will be working under the service crew leader and investigating, locating and repairing leaks and defects in the following commercial roofing systems EPDM, PVC, TPO, Built-up Roofing, Modified Bitumen, and low slope metal. Commercial Roofing Service Technician Responsibilities: Removal and installation of all types of commercial roof systems including: BUR, Modified Bitumen, TPO, EPDM, PVC and slope metal roof systems.