High Voltage (HV) Maintenance Technician

IREN•Sweetwater, WY

17h•Onsite

About The Position

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. 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

High school diploma or equivalent required
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.
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.

Nice To Haves

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.

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.

Benefits

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)
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
Paid professional development and access to financial planning and legal services
Paid Time Off (PTO) and paid holidays
Professional development to support certifications, continuing education, or role related training
Company events and team-building activities