Chiller Technician II

IREN•Childress, TX

3h•Onsite

About The Position

IREN 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.

Requirements

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
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

Nice To Haves

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

Responsibilities

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.
Carry out scheduled preventive maintenance on central utility plant equipment to the published program and quality standard, completing all documentation accurately and on time.
Maintain and support direct-to-chip and immersion cooling infrastructure including CDUs, manifolds, quick-disconnects, filtration and leak detection, escalating complex issues to a Chiller Technician III or the Chiller Specialist.
Perform routine rounds, take operational readings across mechanical systems, and escalate abnormal trends, alarms or conditions promptly.
Diagnose and repair mechanical faults on chillers, pumps, towers and controls independently, escalating complex or high-risk issues to a Chiller Technician III, the Chiller Specialist or the Associate Director of Operations.
Support condenser and technical cooling water treatment programmes through sampling, testing, dosing and record-keeping.
Respond to thermal alarms and mechanical events on shift, execute recovery steps per approved procedures, and contribute to post-incident reviews.
Execute all work on critical plant strictly in accordance with approved Methods of Procedure, SOPs and the change management process – no improvisation on live systems.
Follow lockout/tagout, confined space, hot work, arc flash and refrigerant handling requirements without exception, and raise safety concerns immediately.
Escort and monitor OEM and specialist contractors on site, verifying that work matches the approved scope and meets IREN safety expectations.
Keep work orders, asset histories, readings and refrigerant records accurate and current in the CMMS.
Participate actively in the training and qualification programme, building toward Chiller Technician III and, ultimately, Chiller Specialist competency on liquid cooling and central utility plant operations, while providing on-shift guidance to Chiller Technician Is.

Benefits

base salary
annual performance incentives
opportunities to build long-term wealth through equity programs
100% company paid health insurance premiums (medical, dental, and vision) for employees
75% company paid coverage for dependents
Company-paid short-term and long-term disability insurance
Voluntary life, critical illness, and accident coverage available
Health Savings Accounts (HSA) – when combined with the High Deductible Health Plan
Employee Assistance Program and wellness resources
401(k) retirement plan with company match
Access to financial planning and legal services
Paid Time Off (PTO)
paid holidays
Internal skills training and advancement pathways
Professional development to support certifications, continuing education, or role related training
Company events and team-building activities