Building Systems Testing Technicians perform testing of systems such as HVAC, electrical, plumbing, and fire protection using testing equipment and monitoring tools. They identify faults, verify system performance, and support commissioning activities. Responsibilities include testing, data recording, troubleshooting, and reporting. Work environments include construction sites and commercial buildings. They follow safety standards and testing protocols. Their role ensures systems meet operational requirements, improves reliability, and supports quality assurance, making them essential in construction and facility system deployment globally.