Joblaze summary

In the role of Mechanical Design Engineer at Pacific Fusion, the individual will focus on designing and validating mechanical components essential for advanced fusion energy systems, particularly high-performance vacuum seals. Key skills include expertise in CAD, FEM, and tolerance analysis, with a strong background in vacuum systems required. This position is ideal for experienced engineers with at least five years in mechanical design, especially those familiar with sealing strategies in high-vacuum environments. The company, founded in 2023, is rapidly advancing its ambitious goals in clean energy, fostering a collaborative environment among top professionals in the field.

Joblaze insights

Listed about a month ago — first seen on Joblaze September 3, 2026. Last confirmed on Pacific Fusion's careers page October 27, 2026.
Salary band is in line with the typical range for comparable tech roles (median ~$129,391).
Starts above 24% of 38 comparable senior other roles in United States that list Mechanical Engineering we track (median $147,500 across 17 companies).
Mechanical Engineering appears in 3.3% of 2571 comparable senior other roles in United States; FMEA appears in 0.2% of 2571 comparable senior other roles in United States.

Quick facts

What's the salary range?: Pacific Fusion lists $138,100–$263,800 for this role.
How much experience is required?: At least 5 years of relevant experience for this Mechanical Design Engineer role.
What's the tech stack?: Joblaze extracted these technologies from the posting: CAD, FEM, FMEA, Mechanical Engineering.
What seniority level is this role?: Pacific Fusion targets senior candidates for this position.
Is this full-time or contract?: Full-time for this Mechanical Design Engineer role at Pacific Fusion.

From the original posting

About Pacific Fusion

Why This Role Matters

As a Mechanical Design Engineer, you will help with the design, development, and integration and validation of mechanical components and systems integral to our advanced fusion energy systems. This role requires a top-tier combination of technical expertise, problem-solving skills, and a proactive mindset to meet the exciting challenges in the field of fusion energy.

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

Qualifications:

Bachelor's or Master's degree in Mechanical, Aerospace, or a related engineering field, or equivalent experience
5+ years of mechanical design experience with a focus on vacuum seals and systems, including rough, high, and ultra-high vacuum environments
Strong proficiency in CAD, FEM, and engineering analysis tools
Proven expertise in tolerance analysis, FMEA, seal design, and mechanical integration

Pay Range:

$138,100—$263,800 USD

TOTAL COMPENSATION AND BENEFITS FOR ELIGIBLE EMPLOYEES

Industry-competitive salary
Equity plan
6% employer 401k matching
Medical, Dental, and Vision insurance

RECRUITING AGENCIES

Standard company text repeated across Pacific Fusion's postings is omitted here.

Mechanical Design Engineer

About Pacific Fusion

Why This Role Matters

TOTAL COMPENSATION AND BENEFITS FOR ELIGIBLE EMPLOYEES

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