Staff Electrical Engineer - High-Power Systems - Equity

Commonwealth Fusion Systems LLC; Milpitas (CA); On-site; USD 166,000 - 240,000; Full time

Benefits offered by this job

Health, dental, and vision insurance

Equity

401(k) with employer matching

Flexible vacation days

Job summary

Commonwealth Fusion Systems LLC is seeking a Staff Electrical Engineer to lead the electrical hardware authority for our next-generation R&D and processing equipment. You will own end-to-end electrical design, focusing on 480VAC power distribution, safety, signal integrity, sensor instrumentation, and control panel architecture.

You will bridge high-power electrical infrastructure with machine-level controls.

Qualifications

• Bachelor’s degree in Electrical Engineering (BSEE) is required or Mechatronics Engineering equivalent.
• 10+ years of dedicated electrical engineering experience designing power distribution, electrical cabinets, and hardware architectures for complex industrial or R&D capital equipment.
• Expert proficiency with AutoCAD Electrical for full schematic generation, panel layouts, terminal block design, and wire harness documentation.
• Deep understanding of 480VAC 3-phase systems, transformer sizing, SCCR, arc flash safety, and codes (NFPA 79, NEC/NFPA 70, UL 508A).
• Experience solving EMI/EMC issues, grounding challenges in complex electromechanical tools.
• Be familiar with PLC hardware architectures (Beckhoff, Allen-Bradley, Siemens), fieldbuses (EtherCAT, EtherNet/IP), safety PLCs (TwinSAFE).
• Hands-on hardware troubleshooting, wiring, and fault isolation on the machine floor.

Responsibilities

• Lead Electrical System Architecture: Architect complete 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 electrical schematic packages (one-lines, multi-line, I/O diagrams) per NFPA 79, NEC, and UL 508A.
• Instrumentation & Sensor Integration: Size, specify, and integrate power supplies, circuit protection, VFDs, servo drives, safety relays, and precision sensors.
• Signal Integrity & EMI/EMC Mitigation: Design grounding, shielding, and isolation schemes to protect signals in noisy, high-magnetic environments.
• Hardwired & Control Safety Systems: Implement ANSI/RIA 15.06 and OSHA-compliant safety circuits, interlocks, light curtains, and emergency stop systems.
• Hardware Commissioning & I/O Checkout: Lead hands-on electrical testing, ring-out, power-up, and I/O validation on the tool floor.
• Controls & Software Support: Assist controls engineers with EtherCAT/fieldbuses, verify drive parameters, and debug PLC code or HMI during bring-up.
• Vendor & Panel Shop Direction: Manage external panel build shops, BOMs, and FAT.

Skills

Electrical design

Power distribution

Schematic capture

Grounding & EMI

Industrial safety

Signal integrity

Controls integration

Fieldbus knowledge

Education

Bachelor’s degree in Electrical Engineering (BSEE)

Mechatronics Engineering degree

Tools

AutoCAD Electrical

Panel design

Beckhoff PLC

Allen-Bradley PLC

Siemens PLC

EtherCAT

TwinCAT

Job description

Commonwealth Fusion Systems LLC is seeking a Staff Electrical Engineer to lead the electrical hardware authority for our next-generation R&D and processing equipment. You will own end-to-end electrical design, focusing on 480VAC power distribution, safety, signal integrity, sensor instrumentation, and control panel architecture.

You will bridge high-power electrical infrastructure with machine-level controls.