Senior Commissioning Engineer 22

On Energy is seeking a Senior Commissioning Engineer to lead the commissioning process for mission-critical power and energy storage systems. This full-time role involves significant travel (up to 80%) and requires expertise in BESS and power systems. The engineer will manage site-based teams, ensure compliance with safety and regulatory standards, and act as the primary contact for project stakeholders. Candidates should possess strong leadership and technical skills.
Senior Commissioning Engineer Project Site Lead Mission-Critical Power & Energy Storage

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

Travel Requirement: ~80%

Position Type: Full-Time, Salaried (Exempt) + GSA Rate per diemeligible while traveling

Reports To: Senior Commissioning Manager

Overview

The Senior Commissioning Engineer serves as the Project Site Lead, providing overall leadership and technical oversight of the commissioning process for ON.energy's mission-critical, medium-voltage double-conversion UPS systems built on utility-scale BESS equipment (batteries, transformers, PCS, and controls). Leading site-based teams of 1050 people from installation through commissioning, acceptance testing, and handover to services, the Senior Commissioning Engineer owns critical-path execution, stakeholder communication, and final commissioning sign-off for the site.

This is a senior, high-travel field leadership role for an engineer with deep BESS and power systems expertise who is equally comfortable leading a large multidisciplinary site team, interpreting a complex test plan, and serving as the customer-facing technical authority on site.

Key Responsibilities

Leadership & Technical Oversight

Provide overall leadership and technical oversight of the commissioning process. Manage site-based technical teams of 1050 people from installation through commissioning and acceptance testing, and facilitate smooth handover to services. Manage site-based workflow in line with critical-path demands, ensuring timely and quality delivery. Train and mentor junior engineers and technicians. Stakeholder & Project Management

Act as the primary point of contact between project stakeholders (Project Managers, Project Engineers, Customers, OEMs, and Vendors). Understand and interpret project-specific task orders, change orders, and MSAs. Develop and follow commissioning plans, test plans, procedures, and schedules. Technical Execution & Compliance

Ensure compliance with safety protocols, grid interconnection requirements, and regulatory standards. Lead root cause analysis (RCA) and high-level troubleshooting for major issues. Provide final commissioning sign-off and documentation. Required Qualifications

Extensive experience in BESS, power systems, control architecture, and commissioning. Strong background in commissioning, system integration, and grid compliance. Proficiency in SCADA systems, communication protocols, and power conversion systems. Leadership and project management experience. Bachelor's degree in Electrical, Electronics, or other engineering discipline (or equivalent experience). Willing and able to travel up to ~80% to project sites nationwide. Preferred Qualifications

Safety certifications (OSHA 30, NFPA 70E, First Aid, CPR, AED). Experience leading large site teams on hyperscale data center or utility-scale BESS projects. Experience with medium-voltage switching and system energization. Familiarity with major BESS OEM platforms and SCADA protocols (DNP3, Modbus, etc). Soft Skills

Strong leadership presence; able to lead large, multidisciplinary site teams. Excellent stakeholder and customer communication. Calm under pressure in schedule-driven environments. Bias toward root-cause resolution, safety, and quality. 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 GSA Rate 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 recruitment@on.energy. Benefits vary by role and location and are subject to change.