Mechanical Design Engineer — Vacuum Seals for Fusion

Pacific Fusion Corporation; San Leandro (CA); On-site; USD 138,100 - 263,800; Full time

Benefits offered by this job

Equity plan

6% employer 401k matching

Generous paid time off

Medical, Dental, and Vision insurance

Job summary

Pacific Fusion Corporation in California seeks a Mechanical Design Engineer to design, develop, and validate mechanical components for advanced fusion energy systems. You will lead sealing strategies, perform FMEA, and guide system integration across multidisciplinary teams.

The role requires 5+ years in vacuum-seal design, CAD/FEM expertise, and strong problem-solving skills. Competitive compensation includes equity, healthcare, and generous PTO. Join us to push frontier fusion technology.

Qualifications

• Bachelor's or Master's degree in Mechanical, Aerospace, or related engineering field or equivalent experience.
• 5+ years of mechanical design experience with vacuum seals and systems across rough, high, and ultra-high vacuum environments.
• Proven proficiency in CAD, FEM, and engineering analysis tools.

Responsibilities

• Design and analyze large, high-performance vacuum seals for water-to-air, air-to-high-vacuum, and water-to-high-vacuum transitions.
• Lead experimental design and testing in collaboration with internal teams, external vendors, and academic partners.
• Conduct research into novel sealing techniques; define, execute, and evaluate test campaigns.
• Perform FMEA and tolerance stack-up analyses to ensure seal reliability and system safety.
• Design test assemblies and risk-reduction.
• Review and present technical work across multidisciplinary teams; contribute to system-level integration discussions.
• Provide subject-matter expertise in sealing strategies and help guide the integration of systems in the target area.
• Document sealing processes, validation data, and lessons learned.
• Mentor and support junior engineers on design and integration challenges

Skills

CAD

FEM

Engineering analysis tools

Tolerance analysis

FMEA

Mechanical integration

Education

Bachelor's or Master's degree in Mechanical, Aerospace, or related engineering field

Tools

CAD software

ANSYS or similar

Job description

Pacific Fusion Corporation in California seeks a Mechanical Design Engineer to design, develop, and validate mechanical components for advanced fusion energy systems. You will lead sealing strategies, perform FMEA, and guide system integration across multidisciplinary teams.

The role requires 5+ years in vacuum-seal design, CAD/FEM expertise, and strong problem-solving skills. Competitive compensation includes equity, healthcare, and generous PTO. Join us to push frontier fusion technology.