Commissioning Engineer

ON.energy; United States; On-site; USD 55,104 - 96,432; Full time

Benefits offered by this job

Per diem eligibility

Performance-based bonus

Job summary

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 mission-critical power deployments. You will work on medium-voltage UPS/BESS equipment, report to a Senior Commissioning Engineer, and operate autonomously on-site with safety and quality in mind.

This high-travel, hands-on role requires leading a small team on project sites across the United States (and

Qualifications

• 3–6 years hands-on commissioning experience on BESS, solar + storage, or utility-scale projects.
• Direct experience with battery storage systems including BMS, PCS/inverter, and EMS/SCADA commissioning.
• Ability to read electrical schematics, single-line diagrams, and P&IDs; knowledge of protection relay testing.
• Travel >80% and valid driver’s license and US passport.

Responsibilities

• Execute system-level commissioning tests including functionality checks, network verification, and performance validation for data center, utility-scale, and BESS projects.
• Lead small on-site teams to drive project milestones and coordinate with EPC/OEM teams.
• Perform testing of inverters, PCS, BMS, EMS/SCADA, protection relays, and related BOS equipment.
• Identify, document, and resolve commissioning deficiencies; manage punch lists through to closeout.
• Document results and maintain audit-ready commissioning records for all activities.
• Support FAT validation and SAT, and assist with closeout of commissioning milestones.

Skills

Commissioning experience

Battery storage systems

Electrical schematics

Protection relay testing

Documentation

Team leadership

Travel readiness

Education

Bachelor's degree in Electrical Engineering or Power Systems

Tools

SCADA protocols (DNP3, Modbus)

BESS OEM familiarity

Job description

Commissioning Engineer

Field Engineer / Systems Integrator — Mission-Critical Power & Energy Storage

Location: Field-Based in United States (with travel to active project sites)

Travel Requirement: >80%

Position Type: Full-Time, Hourly (non-exempt, eligible for OT) + per diem eligible while traveling + eligibility for annual short-term incentive bonus (performance based)

Reports To: Senior Commissioning Engineer

ON.energy is building the power infrastructure that makes the AI era possible. As AI demand surges past what the grid and traditional data centers can support, ON.energy provides a new class of power technology proven at gigawatt scale and trusted by the world’s leading cloud and AI companies. Our systems are already deployed across 2.5 GW of hyper-scale campuses, validated by top U.S. national labs, and certified for grid-safe operation by major utilities. With real products in the field, we’re scaling faster than the grid can, transforming power from a bottleneck into a competitive advantage for the companies building the future.

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). Reporting to a Senior Commissioning Engineer, you will be trusted to operate autonomously on-site — managing testing, troubleshooting, and documentation while maintaining the highest standards of safety and quality.

This is a high-travel, hands-on field role. You will spend the majority of your time on project sites across the U.S. and occasionally internationally. The ideal candidate is technically sharp, highly organized, and comfortable leading a small team in fast-paced construction environments.

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.


• Coordinate daily with EPC contractors, OEM field service engineers, and the ON.energy project and engineering teams to resolve technical challenges and keep milestones on track.


• Collaborate with internal and external teams to resolve technical challenges as they arise in the field.

Controls & Systems Integration

• 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 licenseand USpassport


• 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

• Technically sharp, 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 All Roles

• Professional development and growth opportunities


• Opportunity to grow with a mission-driven team shaping the future of clean energy

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 [e-mail].

Benefits vary by role and location and are subject to change.

For US-based roles - What you’ll get:

• Competitive salary + annual performance-based bonus eligibility


• Medical, dental, and vision insurance


• 401(k) with company match


• Paid time off and company holidays

For Mexico-based roles - What you’ll get:

• Competitive salary + annual performance bonus eligibility


• Major medical expenses and life insurance


• Paid time off and holidays (per local policy)

For all roles:

• Professional development and growth opportunities


• Opportunity to grow with a mission-driven team shaping the future of clean energy


• 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 [e-mail]


• Benefits vary by role and location and are subject to change.