Staff Electrical Engineer, High-Power Systems

Commonwealth Fusion Systems LLC; Milpitas (CA); On-site; USD 130,000 - 220,000; Full time

Benefits offered by this job

Equity

Health, dental, and vision insurance

401(k) with employer matching

Holiday and vacation policy

Professional growth opportunities

Team-building activities

Job summary

Commonwealth Fusion Systems LLC is seeking a Staff Electrical Engineer to own end-to-end electrical design for our next-generation R&D and processing equipment, with a focus on 480VAC power distribution, safety, sensor integration, and control panel architecture.

This role bridges high‑power electrical infrastructure with machine controls, requires AutoCAD Electrical expertise, experience with PLCs and fieldbuses, and collaboration with software and mechanical teams to bring hardware to life.

Qualifications

• Bachelor’s degree in Electrical Engineering required; Master’s preferred.
• 10+ years designing power distribution, cabinets, and hardware for complex equipment.
• Expert AutoCAD Electrical for schematics and panel layouts.
• Deep understanding of 480VAC 3-phase, SCCR, arc flash, NFPA 79, NEC, UL 508A.
• Experience solving EMI/EMC issues in complex tools.
• Ability to troubleshoot with field wiring and diagnostics.
• Willingness to travel and work nights/weekends when required.

Responsibilities

• Lead Electrical System Architecture: architect power and electrical hardware platforms for complex R&D tools, managing power distribution, low-voltage DC systems, cable harness design, and power conditioning.
• Schematic Design & Drafting: create, modify, and approve comprehensive electrical schematic packages (one-lines, multi-line, I/O diagrams, panel layouts, cable schedules) per NFPA 79, NEC, and UL 508A standards.
• Instrumentation & Sensor Integration: sizing, specify, and integrate power supplies, circuit protection, VFDs, servo drives, safety relays, and precision sensors (thermocouples, pressure transducers, vacuum gauges, flow meters).
• Signal Integrity & EMI/EMC Mitigation: design robust grounding, shielding, and isolation schemes to protect sensitive analog/digital measurement signals in high-power, electrically noisy, and high-magnetic field environments.
• Hardwired & Control Safety Systems: implement ANSI/RIA 15.06 and OSHA-compliant electrical safety circuits, interlocks, light curtains, and emergency stop systems to protect personnel and high-hazard industrial hardware.
• Hardware Commissioning & I/O Checkout: lead hands-on electrical testing, ring-out, power-up, and I/O validation on the tool floor using multimeters, oscilloscopes, and basic PLC diagnostics.
• Controls & Software Support: assist controls engineers in configuring EtherCAT/industrial fieldbuses, verifying drive parameters, and debugging basic PLC code (Structured Text/TwinCAT) or HMI screens during tool bring-up.
• Vendor & Panel Shop Direction: manage external panel build shops and electrical contractors; specify panel construction details, manage component BOMs, and lead FAT.

Skills

Electrical system architecture

Schematic design

EMI/EMC mitigation

Diagnostics & commissioning

Controls & software coordination

Travel readiness

Education

Bachelor’s degree in Electrical Engineering (BSEE)

Mechatronics Engineering degree

Master’s degree (preferred)

Tools

AutoCAD Electrical

Beckhoff TwinCAT

Siemens / Allen-Bradley PLCs

Industrial fieldbuses (EtherCAT, EtherNet/IP)

Job description

Commonwealth Fusion Systems LLC is seeking a Staff Electrical Engineer to own end-to-end electrical design for our next-generation R&D and processing equipment, with a focus on 480VAC power distribution, safety, sensor integration, and control panel architecture.

This role bridges high‑power electrical infrastructure with machine controls, requires AutoCAD Electrical expertise, experience with PLCs and fieldbuses, and collaboration with software and mechanical teams to bring hardware to life.