Mechanical Thermal Engineer - Battery and Power Systems

Help Build the Next Generation of Data Center Power Systems

Our client is an innovative technology company developing advanced energy storage, battery, and power electronics solutions for mission-critical applications. They are building a new 800V battery-based power supply and backup system designed specifically for next-generation AI and data center infrastructure.

This is an exciting opportunity to join a small, highly technical team and take ownership of the mechanical and thermal design of a groundbreaking product from concept through validation.

About the Role

As a Mechanical/Thermal Design Engineer , you will lead the mechanical packaging and thermal management design of high-power battery and power conversion systems intended for deployment in data center rack environments.

You will work closely with battery, electrical, and systems engineers to develop solutions that are efficient, reliable, serviceable, and scalable.

What You'll Do

• Design battery pack and power converter enclosures for rack-mounted applications.
• Develop thermal management strategies using air cooling and liquid cooling technologies.
• Optimize designs for space constraints, airflow, serviceability, weight, and reliability.
• Collaborate with battery engineers on thermal interfaces between cells, modules, and enclosures.
• Support integration with data center rack infrastructure and cooling systems.
• Lead mechanical qualification activities including vibration, shock, and environmental testing.
• Utilize simulation and analysis tools to validate thermal and mechanical performance.
• Support product development from initial concept through production.

What We're Looking ForRequired Qualifications

• Bachelor's degree in Mechanical Engineering or a related field.
• 2+ years of experience in mechanical packaging and thermal management of battery systems, power electronics, or related products.
• Experience designing both air-cooled and liquid-cooled thermal systems.
• Familiarity with thermal analysis and high-power-density enclosure design.

Preferred Qualifications

• Experience with battery systems, power conversion equipment, EV, aerospace, energy storage, or industrial products.
• Knowledge of data center equipment standards and rack integration requirements.

Why Consider This Opportunity?Compensation

• Base salary: $120,000 - $165,000

Benefits

• 100% employer-paid medical, dental, and vision coverage for employees and eligible dependents
• Four weeks PTO plus year-end shutdown
• 11 paid holidays
• 401(k) with generous employer contribution
• Company-paid disability and life insurance
• Team events, catered lunches, and employee-focused culture

Location

This position requires regular onsite work in Everett, Washington .

Interested?

If you enjoy solving complex thermal and mechanical challenges and want to help shape the future of energy storage and data center power systems, we'd love to hear from you.