Mechanical Engineer II

Navitas Systems LLC, a leader in comprehensive energy storage solutions, was formed in 2011 with the merger of Micro Sun Innovative Energy Storage Solutions and Micro Sun Electronics, and the acquisition of lithium battery company A123 Systems’ Government Services Group. In 2019, East Penn Manufacturing, one of the world’s leading battery manufacturers, acquired majority interest in Navitas Systems. In SEVEN remarkable decades, East Penn has grown from a one-room shop with a product line of five automotive batteries to one of the world’s leading battery manufacturers with over 10,500 full-time employees, 515 product designs, operations around the world, and hundreds of awards for industry excellence.

At our Navitas facilities we engage in the research, design, development, and manufacture of advanced lithium cells and energy storage products and systems for both Commercial and Industrial customers . We invest in our people, they are and always will be the heart of this company. Are you ready to join a family-owned enterprise committed to honoring the contributions of everyone?

Then Navitas is the right place for you.

The Mechanical Engineer II independently leads mechanical analysis and design activities for lithium-ion battery modules and packs used in commercial, industrial, and automotive applications. This role owns complex mechanical engineering work streams, develops and reviews structural and thermal solutions, and translates analysis results into design recommendations. The engineer works across engineering, manufacturing, quality, test, and supplier teams to resolve technical issues and deliver robust products that meet performance, cost, quality, manufacturability, reliability, and safety requirements.

• Lead mechanical design and analysis activities for battery modules and packs from concept through production.
• Develop and review 3D CAD models, engineering drawings, layouts, bills of material, and mechanical specifications.
• Own complex structural calculations, tolerance studies, and mechanical engineering analyses.
• Lead FEA and simulation activities for structural, thermal, vibration, shock, and related mechanical performance requirements.
• Translate simulation and analysis results into design recommendations, tradeoffs, and product improvements.
• Develop and resolve mechanical interfaces between cells, modules, pack structures, cooling systems, electrical assemblies, and enclosures.
• Lead mechanical prototype builds, design verification, validation testing, and simulation-to-test correlation.
• Lead mechanical root‑cause investigations and develop corrective actions for test, manufacturing, supplier, and field issues.
• Apply GD&T, tolerance analysis, and design‑for‑manufacturing and assembly principles to product designs.
• Lead mechanical engineering changes through review, validation, and release processes.
• Provide technical support for supplier component development, qualification, and resolution of mechanical issues.
• Present mechanical analyses, technical risks, design decisions, and recommendations during design reviews.
• Drive improvements in product performance, cost, quality, reliability, serviceability, and manufacturability.
• Develop and improve engineering methods, analysis standards, and reusable technical tools.
• Mentor Mechanical Engineer I team members and provide technical guidance on mechanical engineering activities.

• Bachelor’s degree in Mechanical Engineering or a related engineering discipline.
• 3–7 years of relevant mechanical engineering or product development experience.
• Experience developing complex mechanical or electro‑mechanical products from concept through production.
• Strong understanding of structural mechanics,…