Job description

Job Type: Full-Time | Location: Sweetwater, TX | Department: Construction | Reporting to: Site & Construction Manager | Work Location Type: #onsite

The High Voltage (HV) Maintenance Technician plays a critical role in powering mission-critical, next-generation data center infrastructure by ensuring the safe, reliable operation of high-voltage substations ranging from 13.8kV to 345kV. This hands-on position is responsible for maintaining and troubleshooting advanced HV systems-including transformers, switchgear, circuit breakers, protection and control systems, and SCADA-in a zero-downtime environment where precision and safety are paramount. Working closely with operations, engineering, and external partners, the technician serves as a trusted technical leader, executing complex switching and maintenance activities while upholding the highest standards of reliability, compliance, and operational excellence.

Job requirements

• High school diploma or equivalent required; Technical degree, electrical apprenticeship, or equivalent military/utility experience preferred.
• Minimum 5 years of experience working with high-voltage power systems (13.8kV - 345kV) in data centers, substations, or utility environments preferred.
• Licensed Journeyman/Master Electrician, NETA certification, or equivalent HV qualification preferred.
• NFPA 70E, OSHA 30, or HV switching certification preferred.
• Demonstrated experience in substation operation, switching, and maintenance.
• Familiarity with protective relays, SCADA systems, and HV control schemes.
• Experience overseeing contractors and managing HV maintenance schedules.
• Strong knowledge of HV equipment operation, safety standards, and testing practices.
• Ability to read and interpret electrical one-lines, schematics, and relay coordination studies.
• Skilled in electrical troubleshooting, root cause analysis, and emergency response.
• Proficient with test equipment (primary/secondary injection kits, insulation testers, IR cameras, relay test sets).
• Strong communication and leadership skills to coordinate across multiple teams and vendors.

Other Important Requirements:

• Pre-employment screening, including background check and substance testing may be required according to company policies.
• Must provide own steel-toed work boots; other PPE will be supplied.
• Must be able to reliably commute to the work site daily or have plans to relocate before starting work.
• Must be comfortable working a rotational schedule, which includes day and night shifts as well as weekend work, based on project needs.
• Employees working night shifts will receive a 15% premium added to their hourly rate only for hours worked during night shifts.

Job responsibilities

• Oversee and perform preventive, predictive, and corrective maintenance on HV equipment across substations.
• Conduct switching, isolation, and grounding procedures on HV equipment in compliance with company safety standards and NFPA 70E/OSHA regulations.
• Monitor and maintain HV transformers, circuit breakers, protective relays, battery banks, and associated control systems.
• Perform testing and inspections (e.g., insulation resistance, SF6 gas, oil sampling, DGA, breaker timing, thermography).
• Coordinate and oversee vendor services and contractors performing HV maintenance, testing, and repairs.
• Ensure substations are maintained in compliance with NERC, NEC, and local utility requirements.
• Support fault isolation, root cause analysis, and incident investigations related to HV events.
• Maintain accurate records of switching orders, maintenance logs, and substation condition reports in CMMS.
• Assist with capacity planning, load transfers, and electrical system upgrades in partnership with engineering teams.
• Provide HV safety training, mentoring, and procedural guidance to junior technicians and cross-functional staff.
• Participate in on-call rotation and respond to emergency power events impacting data center operations.

Job benefits

At IREN, we offer a comprehensive, market-competitive total rewards package designed to support employees' well-being, career advancement, and financial wealth. Our offerings reflect our commitment to Proceed with Purpose while rewarding high performance and long-term growth.

Compensation

• The expected hourly range for this role start is $53/hour USD.
  • Actual compensation will be determined based on factors such as experience, qualifications.
• Competitive wages with robust per diem and project allowance, when applicable
• 15% night-shift premium for eligible roles, when applicable
• Overtime compensation for non-exempt workers for hours worked over 40 per week
• Relocation and Living-out-allowance (as applicable and based on successful candidate circumstances)

Health & Wellness

• 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 theHigh-DeductibleHealth Plan
• Employee Assistance Program and wellness resource

Retirement & Financial Wealth

• 401(k) retirement plan with company match
• Paid professional development andaccesstofinancialplanning and legalservices

Time Off & Leave Programs

• Paid Time Off (PTO) and paid holidays

Growth & Development

• Professional development to support certifications, continuingeducation, or role related training

Community & Culture

• Company events and team-building activities

We value diverse perspectives and believe that skills can be developed. If you're passionate about this role, we want to hear from you - whether you meet every criteria or not. Your unique experiences might be exactly what we need!