HVAC Engineer

DXN Limited is a vertically integrated manufacturer and operator of modular data centres across Asia Pacific, designing, engineering, manufacturing and operating prefabricated facilities for government and blue-chip enterprise customers. This is an exciting time for DXN as we continue to expand our engineering team.

About the role

As Senior HVAC Engineer you're the technical authority for cooling, ventilation and pressurisation across our modular data centre (MDC) units. You'll review customer design packages, drive installation on the production floor, and lead commissioning and FAT. Hands-on, not desk-bound — you'll be in the module reading the numbers yourself.

What you'll be doing

• Review and validate customer HVAC design packages — equipment schedules, duct layouts, P&IDs, heat load and psychrometric calculations — and raise RFIs before production starts

• Direct installation of CRAC/CRAH units, in-row and supplemental cooling, ductwork, dampers, diffusers and controls interfaces within the module shell

• Lead commissioning: duct pressure testing, TAB, fan and motor verification, VAV/VFD set-up and BMS integration

• Run thermal mapping and airflow visualisation under simulated IT load and verify ASHRAE A-class compliance

• Specify high-density cooling strategies — hot/cold-aisle containment, in-row and overhead precision cooling, rear-door heat exchangers

• Produce as-built drawings, commissioning reports and TAB records for the FAT pack, and mentor HVAC Technicians on the team

What you'll bring

• Degree or Diploma in Mechanical, Building Services or HVAC Engineering

• 5+ years in HVAC design, installation and commissioning, including 2+ years in data centre, mission-critical or cleanroom environments

• Track record leading commissioning on precision-cooled facilities, producing TAB reports and ASHRAE-compliant thermal documentation

• Strong on heat load, psychrometrics and duct sizing; TAB to SMACNA standards; ASHRAE A1–A4, MS 1525, UBBL 1984 and DOSH regulations; AutoCAD

• Current DOE-recognised Refrigerant Handling Certificate, CIDB Green Card, Working at Heights, and overhead crane competency

• English and Bahasa Malaysia, including technical report writing in both

Bonus points

BEM registration (we'll support your GE application), ASHRAE or MBAM membership, CFD experience (6SigmaDC or similar), VFD and EC fan commissioning, PUE and energy performance work, modular or packaged plant background, First Aid, basic Mandarin.