Senior Mechanical Engineer

About the Company

Pacific Fusion was founded in 2023 with the mission to power the world with abundant, affordable, clean energy. We are rapidly designing and building a pulser-driven inertial fusion system to achieve net facility gain.

Responsibilities

• Own assigned mechanical scope end-to-end, providing technical direction to multidisciplinary teams
• Provide subject matter expertise in mechanical design and analysis for advanced diagnostic instrumentation
• Develop precision motion and thermal management solutions compatible with high-vacuum and radiation environments
• Define and verify mechanical alignment requirements for optical and detector systems
• Apply optomechanical design principles for mirrors, lenses, and optical mounts
• Create and maintain 3D CAD models and 2D fabrication drawings with GD&T
• Perform FEA (structural, thermal) to validate designs against shock, vibration, and thermal loads
• Drive hardware from prototype through delivery, installation, and commissioning
• Maintain rigorous revision control and configuration management in PDM/PLM systems
• Mentor early-career engineers

Requirements

• Bachelor’s degree in mechanical engineering or related field
• 5+ years’ experience in mechanical design for vacuum-compatible instrumentation
• Expert proficiency in professional 3D CAD platforms (Creo, NX, or SolidWorks)
• Proficiency in GD&T and producing detailed manufacturing drawings
• Significant experience with FEA tools (ANSYS, COMSOL)
• Ability to navigate competing design constraints like vacuum compatibility and radiation tolerance
• Strong communication skills for technical documentation and cross-functional collaboration

Preferred Qualifications

• Experience in fusion, plasma physics, accelerator physics, or defense
• Familiarity with vacuum systems, cryogenics, high-voltage hardware, or pulsed power components
• Exposure to large-scale structural systems, pressure vessels, or custom capital equipment

Benefits

• Industry-competitive salary
• Equity plan
• 6% employer 401k matching
• Generous paid time off
• Medical, Dental, and Vision insurance