Battery Mechanical Engineer

About the role: As a Battery Mechanical Engineer at magniX, you will lead and contribute to the design, specification, and integration of advanced lithium-ion battery packs for electric and hybrid-electric aerospace applications. This role blends hands-on conceptual design with the technical leadership required to guide partners and suppliers through detailed development and industrialization.

Primary Responsibilities

• Develop lithium-ion battery pack mechanical and structural packaging concepts in collaboration with magniX engineers and external suppliers.
• Perform CAD modeling of modules, pack enclosures, mounting systems, and aircraft installation interfaces.
• Ensure designs meet aerospace structural, thermal, vibration, and safety requirements.
• Thermal runaway containment strategy design and development
• Define and execute test plans for battery module mechanical testing, including thermal runaway propagation and containment, structural performance, and environmental testing.
• Define battery pack requirements from the system level down to individual components, considering aircraft integration, safety, and certification needs.
• Provide technical oversight and guidance to partners and suppliers responsible for detailed pack design and manufacturing development.
• Review design artifacts, analyses, engineering changes, and qualification plans to ensure alignment with magniX requirements.
• Contribute to program planning activities related to battery pack development, verification, production readiness, and industrialization.
• Participate in development of certification strategies and means of compliance for high-voltage battery systems.

Required Qualifications

• Bachelor’s degree in Electrical, Mechanical, or Chemical Engineering
• 5 years of experience with EV lithium battery pack design
• Experience with high voltage and large size battery packs (400V+ and 50kWh+)

Preferred Qualifications

• Experience with specification and procurement of battery pack components and material
• Experience with qualification strategy development and testing of battery packs, including thermal runaway containment
• Proficient in CAD design tools (preferably Solidworks)

Location: Applicants must be willing and able to commute to magniX's location in Everett, Washington .

Compensation & Benefits

• 100% company-paid premiums for medical, dental, and vision insurance (for employees & dependents).
• 4 weeks paid vacation + 1-week annual end-of-year shutdown, sick time, and 11 paid holidays.
• 401K retirement plan with industry leading 9.5% company contribution.
• Company paid Life insurance, AD&D, Short-Term and Long-Term disability insurance
• Catered lunches and quarterly company fun-day events!

Salary Range: $160-$190k