Commissioning Engineer

Overview

ON.energy is seeking a Commissioning Engineer (Field Engineer / Systems Integrator) to execute system-level commissioning, lead small on-site teams, and drive project milestones across ON.energy’s mission-critical, medium-voltage double-conversion UPS deployments built on utility-scale and C&I BESS equipment (batteries, transformers, PCS, and controls).

Key Responsibilities

• Execute system-level commissioning tests including functionality checks, network verification, and performance validation for data center, utility-scale, and C&I BESS projects.
• Support FAT validation and site acceptance testing (SAT) in coordination with OEM and owner engineers.
• Perform functional testing of inverters, PCS, BMS, EMS/SCADA, protection relays, and associated BOS equipment.
• Identify, document, and resolve commissioning deficiencies; manage punch lists through to closeout.
• Manage a subset of the on-site commissioning team (2–10 people), autonomously driving project initiatives as directed by the Senior Commissioning Engineer and management team.
• Collaborate with internal and external teams to resolve technical challenges as they arise in the field.
• Review and validate configurations for PLC, SCADA, EMS, network infrastructure, and related control systems.
• Conduct troubleshooting for control system issues, network faults, and inverter problems.
• Verify system configuration against design drawings, specifications, and interconnection requirements.
• Support integration and testing of SCADA/DMS communications (DNP3, Modbus, etc.)

Safety & Quality

• Foster and maintain a culture of safety for all team members on site, owning the Job Hazard Analysis (JHA) and Lockout/Tagout (LOTO) programs.
• Support safety inspections and risk assessments throughout the commissioning lifecycle.
• Ensure commissioning activities comply with NFPA 70E, NEC, IEEE, and applicable NERC/FERC standards.
• Provide field reports and maintain thorough, audit-ready documentation for all commissioning activities.

Required Qualifications

• 3–6 years of hands-on commissioning experience on BESS, solar + storage, or utility-scale renewable energy projects.
• Direct experience with battery storage systems including BMS, PCS/inverter, and EMS/SCADA commissioning.
• Proficiency reading and interpreting electrical schematics, single-line diagrams, and P&IDs.
• Working knowledge of protection relay testing, CT/PT verification, and DC/AC high-voltage systems.
• Strong technical writing skills; ability to produce clear field reports and commissioning documents.
• Valid driver’s license and US passport
• Ability to travel >80% of the time.

Preferred Qualifications

• Hands-on experience with one or more major BESS OEMs (Tesla Megapack, BYD, CATL, Sungrow, or similar).
• Familiarity with SCADA communication protocols: DNP3, Modbus TCP/RTU, etc
• Familiarity with utility interconnection processes (distribution and transmission).
• NETA, NICET, or relevant electrical certifications.
• OSHA 10 or OSHA 30 certification; NFPA 70E training.
• Bachelor’s degree in electrical engineering, Power Systems, or a related technical field (or equivalent field experience).

Soft Skills

• Tech-savvy, highly organized, and comfortable leading a small team in fast-paced construction environments.
• Strong communicator across EPC, OEM, and internal stakeholders.
• Autonomous and accountable.
• Safety- and quality-first mindset.

For US-Based Roles - What You’ll Get

• Competitive base salary + annual performance-based bonus eligibility
• Medical, dental, and vision insurance
• 401(k) with company match
• Paid time off and company holidays
• Per diem eligibility while traveling to project sites

For Mexico-Based Roles - What You’ll Get

• Competitive salary + annual performance bonus eligibility
• Christmas Bonus (Aguinaldo): 30 days
• Major medical expenses and life insurance
• Paid time off and holidays (per local policy)

Equal Opportunity

ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation.

Accommodations

If you need an accommodation during the application process, email recruitment@on.energy.

Benefits Vary by Role and Location and Are Subject to Change