No service call schedule! This position is primarily scheduled work. While there will be emergency situations, this is not a typical commercial HVAC service technician position. HVAC Start-Up Technician II is responsible for maintaining an open, positive, and professional line of communication with customers, vendors, general contractors, internal customers, and trade partners. We are seeking an experienced and detail-oriented Commissioning Pipefitter in the Orlando, FL area with a strong background in commercial mechanical rough-ins to support the start-up and commissioning of large-scale HVAC and mechanical systems. This field-based role plays a key part in ensuring piping systems are correctly installed, tested, and fully operational in alignment with project specifications, safety standards, and commissioning protocols. The ideal candidate will have a minimum of 5 years' experience installing and verifying mechanical piping systems on commercial projects, with a strong understanding of chilled water, hot water, steam, and gas piping. This role requires flexibility for nights, weekends, overtime, and occasional overnight travel.