Principal Electrical Engineer

ON.energy is setting the standard for large load interconnection. ON’s patented AI UPS™ is a medium-voltage UPS that serves as a firewall, protecting the data center from the grid, and the grid from the data center. With multiple gigawatts currently under construction, we are enabling grid-safe data centers.

We are seeking a Principal Electrical Engineer to serve as a technical leader across On.Energy's product portfolio. This is a product-focused, senior individual contributor role requiring breadth across power systems, electrical design, systems integration and electrical codes and standards

. You will set electrical engineering technical direction, lead complex design work, establish electrical standards, and mentor engineering teams across the Hardware Engineering team.

What You'll Do

• Serve as the technical authority for electrical system design across On.Energy product lines.
• Lead electrical architecture design including power distribution, protection coordination, grounding strategy, surge protection and overall electrical system integration.
• Support design verification through domain electrical design standards, specifications, and review frameworks for the product portfolio e.g. NFPA 70, IEEE, ANSI and UL standards.
• Stablish verification methods to demonstrate electrical design compliance to technical requirements e.g. analytical, simulation or testing.
• Perform and review electrical calculations, load flow, short circuit, arc flash, protection, EMI, voltage surge studies.
• Lead design reviews and support root cause analyses for both new product development and field issues.
• Compile and validate product technical information packages including but not limited to SLDs, specs, and compliance documentation.
• Recommend vendors, components, and design approaches for key electrical equipment.
• Mentor and develop senior and mid-level electrical engineering knowledge across Hardware Engineering team.
• Required Qualifications
• Master's or Ph.D. in Electrical Engineering
• 10 to 15+ years of electrical engineering experience in electrical systems analysis, energy storage, or industrial applications.
• Expert knowledge of electrical power systems analysis, protection schemes, and grounding/bonding, EMI and overvoltage phenomena.
• Proven ability to produce and review
• SLDs, schematics, and electrical specifications at product level.
• Strong familiarity with NEC, IEEE, IEC, and UL standards applicable to electrical equipment.
• Excellent communication skills across technical and executive audiences.
• Willing to travel up to 20% for prototype testing and product commissioning.
• Preferred Plus
• PE license or equivalent certification.
• Background in data center electrical backbone design.
• Experience with UL9540, NFPA 855, UL1741, UL1778 and other related battery storage standards.
• Experience with battery systems, power electronics, UPS, or mission-critical power system design.
• 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.
• Benefits vary by role and location and are subject to change.
• Agency Notice: ON.energy does not accept unsolicited resumes from staffing agencies, search firms, or third-party recruiters. Resumes submitted without a fully executed Master Services Agreement (MSA) and a written request from an authorized member of our Talent Acquisition team will be considered the property of ON.energy. No placement fees or compensation will be paid for unsolicited candidate submissions.