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.
Skills Required
- Master's or Ph.D. in Electrical Engineering with specialization in Power Electronics or Utility Power Systems
- 10 to 15+ years of engineering leadership in utility-scale energy storage, high-voltage data center substations, or large-scale grid tie-ins
- Experience designing and architecting 1500VDC topologies, medium-voltage grid integrations, BESS and high-voltage UPS systems
- Expertise modeling battery sizing, degradation lifecycles, and EMS/SCADA plant controller interactions
- Proficiency with communication protocols Modbus and DNP3 for plant/hardware integration
- Mastery of power system analysis tools (ETAP, SKM, PSCAD) for short-circuit, coordination, harmonics, and arc flash studies
- Demonstrated history leading products through NRTL/UL/CSA/Intertek certification programs, specifically UL 9540A thermal runaway testing
- Proven experience presenting complex technical concepts and risk mitigations to C-suite and hyperscale/cloud customers
- Proven ability to perform root-cause analysis for power electronics failures and major field system anomalies
- Professional Engineer (PE) license
What We Do
ON.energy is building the backbone of energy and AI infrastructure, powering grid-safe data centers and mission-critical facilities. The company supplies and operates hyperscale power systems that solve the toughest resilience challenges, delivering custom solutions for AI data centers, mission-critical facilities, and front-of-the-meter assets. Its track record spans industrial, manufacturing, infrastructure, transportation, and grid-scale storage. With patented technology and proprietary software, ON.energy develops projects worldwide that set new benchmarks for resilience.
