Senior Power Electronics Engineer - Fusion-Grade 1GW Pulsed Power

Commonwealth Fusion Systems LLC; Massachusetts; On-site; USD 134,000 - 205,000; Full time

Benefits offered by this job

Equity

13 Company-wide Holidays

Flexible vacation days

10 sick days

Parental leave policy

Health, dental, and vision insurance

401(k) with employer matching

Professional growth opportunities

Team-building activities

Job summary

Commonwealth Fusion Systems LLC in Massachusetts seeks a Senior Power Electronics Engineer to lead high-power power supply development for ARC and SPARC. You will design, simulate, prototype, and qualify next-generation converters using Si/SiC devices and collaborate with device manufacturers.

You'll develop specifications, validation plans, and engineering reports for cross-functional teams, with emphasis on hands-on testing, design reviews, and clear technical communication.

Qualifications

• 8+ years of related experience with Bachelor’s degree (or) a Master’s degree with 6+ years of experience with power electronics based systems.
• Hands on product development experience for power electronic converter systems.
• Knowledge of various inverter circuit topologies and the benefits and limitations.
• Experience with modeling & simulation with analysis tools such as PLECS, PSPICE, MATLAB etc.
• Extensive experience with semiconductor devices (IGBT, MOSFET, etc.) and magnetic components (transformers, inductors etc.)
• Fundamental understanding of gate drive circuits, design and device protection
• Experience with packaging design of power conversion equipment and thermal management
• Experience with high power electrical equipment >10MVA
• Experience with hands on testing of electrical components, sub-assemblies and systems in the laboratory and use of oscilloscopes and other measurement equipment
• Excellent written and verbal communication skills, ability to conduct design reviews, organize and present results to both expert and non-technical audiences

Responsibilities

• Architect and design the next generation of high power (>10MVA) medium voltage power supplies for ARC tokamaks utilizing latest Si and SiC semiconductor devices.
• Collaborate with power semiconductor device manufacturers to develop and qualify new devices for fusion focused applications.
• Model and simulate power electronic circuits and components to evaluate and characterize converter performance, efficiency, stability, etc.
• Build, test, and validate prototype 4Q power modules (H-bridge, DC link, passives, thermal management, etc.) for use within ARC tokamak power supplies.
• Turn qualified prototype designs into productized solutions for ARC power supplies.
• Develop technical requirements, specifications and qualification plans for corresponding power circuit components (capacitors, magnetics, passives, etc.)
• Support cross-functional team technical developments such as power distribution, energy storage, RF and other systems delivering electrical power for fusion applications
• Document designs, simulations and test results into engineering reports

Skills

Power electronics

System-level design

Circuit simulation

Gate drive design

Thermal management

Prototype testing

Team leadership

Communication skills

Education

Bachelor's degree in Electrical Engineering

Master's degree in Electrical Engineering

Tools

PLECS

PSPICE

MATLAB

Oscilloscopes

Job description

Commonwealth Fusion Systems LLC in Massachusetts seeks a Senior Power Electronics Engineer to lead high-power power supply development for ARC and SPARC. You will design, simulate, prototype, and qualify next-generation converters using Si/SiC devices and collaborate with device manufacturers.

You'll develop specifications, validation plans, and engineering reports for cross-functional teams, with emphasis on hands-on testing, design reviews, and clear technical communication.