HVAC-DDC System Assessment Technician

PZI International•Huntsville, AL

19h•Onsite

About The Position

The HVAC–DDC System Assessment Technical Representative is responsible for performing a comprehensive evaluation of the facility's HVAC and Direct Digital Control (DDC) systems, which are currently in operational failure and causing moisture-related building damage. The representative will conduct on-site diagnostics, testing, calibration, and provide corrective reprogramming of the Trane Tracer SC+ system. The role includes performing a full system assessment, documenting findings, and preparing a detailed corrective action report.

Requirements

Minimum 7 years documented experience in commercial HVAC and DDC diagnostics, service, and commissioning.
Formal certification in Trane Tracer SC+ Operations and Service.
Proficiency with BACnet (MS/TP and IP) and Modbus network protocols.
Strong knowledge of mechanical systems including chillers, VAVs, VFDs, air distribution, and psychometrics
Valid driver's license (eligible for on‑island license).

Responsibilities

Documentation Review Review as-built mechanical and control drawings, Sequence of Operations (SOO), historical maintenance logs, repair records, and trend data.
On-Site Technical Assessment Perform full evaluation of: DDC Controllers & Network Verify communication/power status and diagnose software alarms & programming faults. Sensors & Devices Calibrate all critical sensors (temperature, humidity, and pressure). Test actuators, valves, VAVs, and VFDs through full range of motion. Mechanical HVAC Equipment Inspect AHUs, DOAS units, pumps, chillers, and other major components. Validate mechanical response to DDC commands. Check refrigerant levels, safety controls, pump seals, and clean strainers. Functional Performance Testing Conduct system performance verification, including occupied/unoccupied modes, economizer operations, and heating/cooling changeover. Confirm ability to maintain temperature/humidity setpoints under load.
Corrective Action Deliverables Provide root-cause analysis of system failures. Deliver prioritized recommendations for repairs, replacements, upgrades, and programming changes. Provide defective component list and a combined mechanical/DDC maintenance checklist. Provide updated or proposed Sequence of Operations (SOO).
Tools, Materials & Logistics Provide list of required tools/materials; arrange shipment when not available on-island.
Safety & Compliance Follow all KBR, federal, NSF Diego Garcia, and BIOT regulations. Wear PPE provided and maintain proper identification.