High Voltage (HV) Construction Supervisor

Job Type: Full-Time | Location: Sweetwater, TX | Department: Construction | Reporting to: Site & Construction Manager | Work Location Type: #onsite IREN is a vertically integrated AI Cloud provider, delivering large-scale data centers and GPU clusters for AI training and inference. IREN’s platform is underpinned by its expansive portfolio of grid-connected land and power in renewable-rich regions across North America, Europe and APAC. The High Voltage (HV) Construction Supervisor is a critical leadership role responsible for protecting and delivering power to some of the most advanced, mission-critical data center infrastructure in the industry. In this role, you will serve as the site authority for high-voltage systems, leading technicians and contractors through complex switching, maintenance, and outage activities that directly support 24/7 operations. You will work at the center of power reliability—partnering with Operations, Engineering, and utility providers to ensure safe, uninterrupted energy delivery while supporting system expansions and next-generation infrastructure growth. 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. High school diploma or equivalent required. Minimum 7 years of experience working with high-voltage systems (13.8kV–345kV) in substations, utilities, industrial facilities, or data center environments. Minimum 2 years of experience in a lead or supervisory role (Supervisor, Foreman, Lead Technician, or equivalent) overseeing HV electrical work execution. Journeyman or Master Electrician license, or Journeyman Lineman license. Authorized/qualified for high-voltage switching. NETA certification or equivalent HV testing experience. NFPA 70E and OSHA 30 certification. Expert knowledge of HV switching procedures and substation safety practices. Strong technical understanding of power transformers, circuit breakers, protective relays, battery and DC control systems, Substation control schemes. Ability to read and interpret one-lines diagrams, schematics, wiring diagrams, relay logic, and coordination studies. Working knowledge of HV testing and diagnostics, including: DGA / oil analysis, insulation resistance testing, breaker timing, infrared thermography, SF6 handling and testing. Strong leadership presence with effective communication and contractor coordination skills. Proven ability to make sound decisions during outages, abnormal operating conditions, and emergency response events. Proficient with QA/QC systems, PtW and Switching Instruction documentation, and reporting standards. Other Important Requirements : Pre-employment screening, including background check and substance testing may be required according to company policies. Work performed in outdoor substations and energized electrical environments. Must provide own steel-toed work boots; all other required PPE will be supplied. Ability to walk job sites, climb ladders and stairs, and perform field inspections and oversight. Must be able to reliably commute to the work site daily or relocate prior to start. Must be comfortable working a rotational schedule, including days, nights, weekends, and holidays as required. Must be able to respond during off-hours for emergency events. Employees working night shifts receive a 15% shift premium for hours worked during night shifts. Supervise daily HV construction activities to ensure safe, compliant, and high-quality execution across substations. Lead HV switching, isolation, grounding, and restoration activities in accordance with company procedures and NFPA 70E / OSHA requirements. Oversee installation, commissioning, and energization of HV equipment, including transformers, circuit breakers, switchgear, protective relays, and control power systems. Coordinate and oversee third-party contractors performing HV testing, and commissioning work; verify qualifications, scope compliance, and work quality. Ensure compliance with NEC, NERC (where applicable), local utility requirements, and internal operational standards. Review, approve, and maintain switching orders, QA/QC reports, condition assessments, test results. Support fault response, troubleshooting, incident investigations, and root cause analysis (RCA); implement corrective actions to prevent recurrence. Partner with Engineering and Operations on outage planning, load transfers, equipment upgrades, commissioning, and energization activities. Provide leadership, mentoring, and training to HV technicians, reinforcing safe work practices and procedural discipline. Maintain strict adherence to all safety policies and procedures. Safety is a condition of employment. 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 rate for this role is $59.00 USD. Actual compensation will be determined based on factors such as experience, qualifications. Per Diem amount of $180.00 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 the High-Deductible Health Plan Employee Assistance Program and wellness resources Retirement & Financial Wealth 401(k) retirement plan with company match Paid professional development and access to financial planning and legal services Time Off & Leave Programs Paid Time Off (PTO) and paid holidays Growth & Development Professional development to support certifications, continuing education, 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! IE US Operations Inc., the employing entity and proud member of the IREN group is an equal opportunity employer that is committed to creating an inclusive workplace. We are committed to evaluating qualified applicants and do not discriminate against protected characteristics under applicable legislation. IE US Operations, Inc. “IREN” participates in E-Verify and will provide the federal government with your Form I-9 information to confirm that you are authorized to work in the United States. By applying for this position and submitting your resume and application materials, you consent to the processing of your personal information in accordance with our Job Applicant Privacy Statement available on our website at www.iren.com .