HVAC-DDC System Assessment Technician

Job Description

Job DescriptionPosition Summary

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.

Key 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.

Required Qualifications

• 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).

Working Conditions

• Work performed on Diego Garcia military installation.
• Regular hours: 0700–1700, Monday–Saturday.
• Period of performance: 6 days including travel.
• Base life support (lodging, meals, etc.) provided by KBR and back‑charged.