Battery Systems Engineer

EPG is currently seeking a Battery Systems Engineer for one of our partners that is an established high-voltage battery and power-electronics company bringing technology proven in demanding, high-reliability applications to a new backup-power product for AI data centers. In this position, you will own the design of a new 800V stationary battery pack and energy-storage system from architecture through first production. Responsibilities Own 800V stationary battery pack and ESS design: pack architecture and cell configuration. Set cycle-life, calendar-life, and thermal targets for continuous high-uptime duty. Own pack-level safety architecture and abuse tolerance. Define BMS requirements and interfaces to the converter and rack controls. Drive pack-level validation and testing. Requirements BS in Electrical, Mechanical, or Chemical Engineering. 5+ years of battery pack or BMS design. High-voltage (400V+) Li-ion pack design, including module architecture and BMS integration. Battery safety and abuse testing. This role is onsite in the Pacific Northwest. Must be able to work in the United States without sponsorship (US Persons only, export-control requirement). Preferred Qualifications Stationary ESS experience with UL 9540 / UL 9540A. Concept-to-first-production experience. NMC / Si or other high-energy-density chemistries. Benefits Competitive salary, relocation assistance, fully paid healthcare, and a strong 401(k) match. Own a clean-sheet 800V battery system built on proven high-voltage battery technology. Shape the core of a brand-new datacenter product line.