Electrical Battery Engineer III

Electrical Battery Engineer III

The Electrical Battery Engineer III is a senior individual contributor responsible for the electrical design, analysis, and validation of battery cells, modules, and pack-level systems used in high-reliability applications (aerospace, defense, and/or industrial energy storage). This role owns technical decisions across the product lifecycle — from concept through qualification and production support — and serves as a technical resource for less-experienced engineers.

Key Responsibilities

• Lead electrical design of battery modules and packs, including cell selection, series/parallel configuration, protection circuitry, and BMS (Battery Management System) integration
• Perform electrical analysis: voltage/current distribution, thermal-electrical interactions, impedance, state-of-charge/state-of-health estimation, and failure mode analysis (FMEA)
• Develop and execute test plans for electrical performance, safety, and environmental qualification (e.g., abuse testing, overcharge/short circuit, vibration, thermal cycling) in accordance with standards such as MIL-PRF, DO-311, UN 38.3, or UL 1642/2580
• Support NDAA/DFARS compliance efforts, including sourcing traceability for cells and components (relevant to defense-focused battery programs)
• Collaborate with mechanical, thermal, and systems engineering teams to ensure integrated pack design meets performance, safety, and regulatory requirements
• Create and maintain engineering documentation: schematics, wiring diagrams, test reports, and design verification records
• Support root cause investigations for field or production issues and implement corrective actions
• Interface with customers and suppliers on technical requirements, design reviews, and qualification data
• Mentor junior engineers (Engineer I/II) and review their design and test work
• Support new product introduction (NPI) and transition of designs from prototype to production

Required Qualifications

• Bachelor's degree in Electrical Engineering, Electrochemical Engineering, or related field (Master's preferred)
• 5–8+ years of experience in battery/energy storage system design, preferably in aerospace, defense, EV, or industrial applications
• Strong working knowledge of lithium-ion and/or other advanced cell chemistries
• Experience with BMS design/integration, protection circuit design, and electrical safety analysis
• Proficiency with circuit development, simulation and analysis tools (e.g., Altium Designer, MATLAB/Simulink)
• Familiarity with relevant industry/military standards (MIL-STD-810, DO-160, UN 38.3, UL, IEC 62133)
• Strong documentation and technical writing skills
• Ability to obtain/maintain a security clearance or meet ITAR/EAR requirements, if applicable

Preferred Qualifications

• Experience with NDAA-compliant battery programs and Chinese-cell-component exclusion requirements
• Hands-on experience with battery pack manufacturing and laser welding processes
• Exposure to both high-voltage and low-voltage battery system architectures
• Six Sigma / Lean manufacturing familiarity
• Prior experience in a regulated or defense-contracting environment (ITAR/EAR, DFARS)

Physical/Work Environment

• Primarily office/lab environment with occasional time on the production floor
• Occasional travel for customer meetings, supplier audits, or qualification testing