Help Deliver Some of Australia's most critical infrastructure We are seeking a Commissioning Engineer to join our team and support the delivery of major data centre projects across Sydney. Working alongside experienced Lead Commissioning Engineers, you'll play a hands-on role testing, validating and commissioning critical BMS, cooling and power systems before they go live. This role will suit an engineer who enjoys problem-solving, working through structured test procedures and delivering high-quality outcomes through attention to detail. What you will do:
• Deliver BMS commissioning activities across L1-L5 commissioning phases
• Execute L4 Functional Testing and L5 Integrated Systems Testing (IST)
• Complete point-to-point testing of CRAHs, CDUs, FWUs, AHUs and chilled water systems
• Verify field instrumentation and BMS interfaces to UPS, generators, switchboards, PDUs, chillers and power metering systems
• Validate control sequences, alarms, trends, graphics and failover functionality
• Troubleshoot commissioning issues and support defect resolution
• Complete commissioning records, test sheets, defect close-out and handover documentation
• Work closely with project teams, subcontractors and clients to ensure successful project delivery About You We're looking for someone who combines technical capability with a methodical, detail-focused approach to commissioning and testing.
• Degree in Electrical, Mechatronics or Automation Engineering




• Experience with BMS, controls, automation or commissioning activities
• Strong troubleshooting and fault-finding capability
• Ability to follow test procedures and commissioning plans accurately
• Robust attention to detail and documentation skills
• Experience interpreting electrical drawings and technical documentation
• Exposure to PLC, Ignition SCADA, BMS or EMS platforms
• Strong communication skills and ability to work with multiple stakeholders
• Willingness to work across Sydney project sites Highly Regarded
• Data centre or critical infrastructure experience
• Schneider, Siemens, Honeywell or similar BMS platforms
• Experience with HVAC, chilled water or critical cooling systems
• Exposure to L4/L5 commissioning and Integrated Systems Testing (IST) Why Join Crossmuller?
• Work on some of Australia's largest and most advanced data centre projects
• Build sought-after experience in critical infrastructure commissioning
• Diverse and technically challenging project work
• Career growth opportunities across Crossmuller and Borg Group
• Long-term job security with a growing Australian business
• Supportive team culture and ongoing professional development Apply Now If you're a practical, detail-oriented engineer who enjoys troubleshooting systems, following structured testing processes and delivering quality outcomes, we'd love to hear from you.

📌 BMS Commissioning Engineer (Sydney)
🏢 Crossmuller
📍 Sydney