Chiller Technician II

Job Type: Full-time|

Location:

Childress, TX | Department :
Operations| Reporting to:
Mechanical Manager | Work Location Type: #onsite

I REN is a leading AI Cloud Service Provider, delivering large-scale GPU clusters for AI training and inference. IREN’s vertically integrated platform is underpinned by its expansive portfolio of grid-connected land and data centers in renewable-rich regions across the U.S. and Canada.

The Chiller Technician II independently operates and maintains the central utility plant (CUP) at IREN’s liquid-cooled hyperscale campuses in West Texas and Oklahoma. Working on shift as part of the mechanical team, this role keeps running the plant that removes heat from some of the densest AI compute in North America – centrifugal and screw chillers, cooling towers, pumps, heat exchangers, coolant distribution units and the direct-to-chip liquid cooling loops that serve the racks themselves.

This is a hands-on, high-accountability role for an experienced technician ready for full ownership of mission‑critical central utility plant operations. Reporting to the Associate Director of Operations and working alongside Chiller Technician IIIs and the Chiller Specialist, the successful candidate will operate with a good degree of independence, provide on‑shift guidance to Chiller Technician Is, and follow a clear progression path toward Chiller Technician III and Chiller Specialist as the portfolio grows.

With 100% renewable energy, we build, own and operate our data centers and take pride in being at the forefront of sustainable solutions for the ever‑evolving applications of high-performance compute. We believe that human progress is invaluable, but it should be done in the right way – responsibly, sustainably and having a positive impact on the communities we operate in.

• 3+ years of hands‑on experience maintaining and troubleshooting commercial or industrial chillers and HVAC plant; mission‑critical or industrial process cooling experience is strongly preferred
• EPA Section 608 Universal certification is required (Type II minimum considered with a commitment to obtain Universal)
• Working knowledge of chiller refrigerant circuits, cooling towers, pumps, heat exchangers, VFDs and hydronic systems
• Ability to read and interpret mechanical drawings, schematics and basic control sequences
• Willingness and aptitude to be trained on direct‑to‑chip and immersion liquid cooling systems – prior exposure is an advantage but not required
• Familiarity with BMS or building automation front ends, and comfort using a CMMS for work order and record management
• High school diploma or equivalent required; trade school, apprenticeship, military technical training or an associate degree in HVAC, refrigeration or mechanical technology preferred
• Additional credentials welcomed: HVAC journeyman licence, Texas TDLR registration, NATE, RETA, or manufacturer‑specific chiller training
• Ability to work 12-hour rotating shifts including nights, weekends and holidays, and to participate in an on‑call rotation
• Physically able to climb ladders and stairs, work at height and in confined spaces, lift up to 50 pounds, and work in mechanical spaces and outdoor West Texas conditions
• Valid driver’s license and willingness to travel between the Texas and Oklahoma campuses as required
• Must live within, or be willing to relocate to, commutable distance of the assigned campus; relocation assistance is available
• A safety‑first mindset, reliable attendance, and the discipline to follow written procedures precisely in a live critical environment

• Central utility plant operation:
  Operate, monitor and maintain the central utility plant (CUP) – centrifugal, screw and air‑cooled chillers, cooling towers, pumps, heat exchangers, dry coolers, valves and associated piping – on assigned shifts, working independently and guiding Chiller Technician Is as needed.
• Preventive maintenance execution:
  Carry out scheduled preventive maintenance on central utility plant equipment to the published program and quality standard, completing all documentation accurately and on time.
• Liquid cooling support:
  Maintain and support…