Job Description

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.

We’re looking for a Senior Power Electronics Engineer with project-based engineering experience to lead the power electronics product design, documentation, project-specific technical compliance and support the development activities related to these products. This is a product focused role—we need someone who can speak fluently about both power electronics, its controls and BESS systems, ideally have experience with UPS systems in mission critical applications, and interface with project, commissioning and O&M engineering teams.

Key Responsibilities:

Support the business development team by providing technical proposals e.g. SLDs and GAs that meet the customer’s needs.
Compile product technical information packages for the project engineering team.
Co-lead review and validation of the PCS-related topics during the project execution phase.
Maintain technical documentation including as-built drawings
Support product development by capturing design improvement feedback from the different project phases: design, commissioning and O&M.
Support product development by recommending design approaches and vendors of the main equipment.
Participate in product design sprints with the development team.
Participate in the product’s commissioning phase.

Required Skills & Experience:

Bachelor’s degree in Electrical Engineering, Power Electronics Engineering, or similar technical field.
8+ years of hands-on power electronics engineering experience in project-based or industrial settings.
Proven system-level design experience of MW scale power electronics equipment.
Understanding of BESS systems integration with power electronics equipment.
Ability to produce and read single lines and general arrangement drawings
Excellent communication skills across technical and non-technical teams.
Willing to travel up to 20% for product FAT inspection and site commissioning witnessing.

Preferred Experience:

Experience with BESS, UPS/mission critical applications or utility-scale infrastructure

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
Christmas Bonus (Aguinaldo): 30 days
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 recruitment@onenergystorage.com
Benefits vary by role and location and are subject to change.

Senior Power Electronics Engineer - Energy Infrastructure Projects - OnEnergy

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