Sr Mechanical Engineer, Battery Systems

Help Shape the Future of Electrification

Our client is an innovative clean technology company developing advanced battery systems, high-voltage power electronics, electric propulsion solutions, and energy storage technologies for mission-critical applications across aerospace, defense, mobility, data centers, and other emerging industries.

As they expand their next-generation battery product portfolio, they are seeking a Senior Battery Mechanical Engineer to play a key role in the design, integration, testing, and industrialization of high-voltage lithium-ion battery systems. This is an opportunity to work on cutting-edge electrification technologies while collaborating with a highly talented engineering team in a fast-paced, mission-driven environment.

What You'll Do

As a Senior Battery Mechanical Engineer, you will lead the mechanical design and development of advanced lithium-ion battery packs from concept through production readiness.

Key responsibilities include:

• Design battery pack enclosures, structural components, mounting solutions, and integration interfaces using CAD tools.
• Develop mechanical and packaging concepts for high-voltage lithium-ion battery systems.
• Ensure designs meet demanding structural, thermal, vibration, safety, and reliability requirements.
• Lead thermal runaway containment strategy development and validation activities.
• Define and execute mechanical verification and qualification testing, including environmental, structural, and thermal testing.
• Develop battery pack requirements from system-level architecture down to individual components.
• Partner with suppliers and external development organizations, providing technical oversight and design guidance.
• Review engineering analyses, qualification plans, design changes, and manufacturing readiness activities.
• Support product development planning, verification, validation, certification, and production launch efforts.
• Contribute to certification strategies and regulatory compliance efforts for advanced battery systems.

What We're Looking ForRequired Qualifications

• Bachelor's degree in Mechanical, Electrical, Chemical Engineering, or a related discipline
• 7+ years of experience designing lithium-ion battery packs
• Experience working with high-voltage battery systems (400V+) and large-format battery packs (50kWh+)
• Strong understanding of mechanical design principles, structural packaging, and battery system integration

Preferred Qualifications

• Experience sourcing and specifying battery pack materials and components
• Experience developing battery qualification and test strategies
• Knowledge of thermal runaway mitigation and containment techniques
• Proficiency with CAD tools, preferably SolidWorks
• Aerospace, electric vehicle, energy storage, or other highly regulated product development experience

Why Consider This Opportunity?Competitive Compensation

• Base salary: $160,000 - $210,000

Outstanding Benefits

• 100% employer-paid medical, dental, and vision coverage for employees and eligible dependents
• 4 weeks of paid vacation
• Additional company shutdown at year-end
• 11 paid holidays
• Generous 401(k) program with significant employer contribution
• Company-paid life insurance, short-term disability, and long-term disability coverage
• Team events, catered lunches, and employee appreciation activities

Additional Information

• This position is based in Everett, Washington , and requires regular onsite collaboration.
• Employment is contingent upon successful completion of background screening requirements.
• Due to the nature of the work, candidates may need to meet U.S. export control requirements.

Interested?

If you're passionate about advanced battery technology, electrification, and developing products that push the boundaries of performance and safety, we'd love to connect with you.

Apply today to learn more about this confidential opportunity.