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 diem eligible 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 10-50 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 10-50 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