C

Castelion

Designs and manufactures hypersonic strike weapons

Senior Power Electronics Engineer

Power Systems EngineeringConfirmed live in the last 24 hours
Full-timeNo salary listedIn-person

About the Job

Requirements

  • A Bachelor's, Master's, or PhD in Electrical Engineering or a related field is required.
  • At least 5 years of experience in power electronics design, analysis, and validation for aerospace, defense, or other high-reliability systems is required.
  • A strong background in battery systems, DC-DC power conversion, and power distribution architectures is required.
  • Experience designing power controllers and power management systems for embedded or avionics applications is required.
  • Proficiency in circuit design, simulation, and analysis tools such as SPICE or MATLAB/Simulink, or equivalent tools, is required.
  • Experience with hardware bring-up, testing, and troubleshooting in a lab or flight hardware environment is required.
  • Familiarity with thermal management, electromagnetic interference/electromagnetic compatibility considerations, and ruggedized electronics design is required.

Responsibilities

  • Design and develop power electronics systems, including battery architectures, power conversion, and distribution for high-performance flight vehicles.
  • Lead the design and optimization of power controllers and power management systems to ensure stable, efficient operation across mission phases.
  • Develop and analyze battery systems, including selection, packaging, thermal considerations, and safety mechanisms for demanding environments.
  • Work with avionics, guidance, navigation and control, and flight software teams to integrate power systems with vehicle subsystems.
  • Conduct circuit-level and system-level modeling and simulation to evaluate performance, efficiency, and reliability under dynamic conditions.
  • Support hardware bring-up, integration, and test campaigns, including troubleshooting and root cause analysis.
  • Define and execute qualification and flight test plans, translating results into system-level improvements.
  • Mentor junior engineers and contribute to best practices in power electronics design.
  • Partner with program leadership to make technical tradeoffs aligned with mission success.

About the Company

Castelion

Designs and manufactures hypersonic strike weapons

Castelion designs, tests, and manufactures hypersonic strike weapons for the U.S. military, aiming to deter future wars with fast, credible, non-nuclear deterrence. Its flagship Blackbeard is a low-cost, mass-producible hypersonic missile compatible with HIMARS/MLRS, built in-house with solid rocket motors, propellant, and a real-time, hardware-isolated flight computer. The company uses vertical integration and a rapid test-and-iterate cycle, with frequent flight tests and Project Ranger, a 1,000-acre facility in New Mexico to scale production. It competes with traditional defense primes on speed and cost, selling under government contracts and development awards to field advanced weapons at scale.

Company size
201-500
Company stage
Series C
Total funding
$1.5B
Headquarters
Torrance, CA
Founded
2022

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