Product Application Engineer

Location: Troy, MI Department: Engineering & Development / R&D Reports to: Program Manager Employment Type: Full-time, exempt Travel: Occasional travel to Elkhart, Indiana, customer and supplier locations, certification partners, and testing or commissioning sites. Moderate travel is expected during the first 90 days, with travel decreasing after the initial training period. Help Engineer the Next Generation of Battery Systems OPmobility is seeking a Product Application Engineer – BMS to lead the definition, integration, validation, and customer application support of Battery Management Systems for electrified mobility and other high-reliability battery applications. This position is well suited for an experienced systems or BMS engineer who can connect customer requirements with hardware, embedded software, controls, diagnostics, validation, functional safety, and production needs. You will work across industrial, railway, heavy-duty, off-highway, commercial vehicle, and passenger EV programs while collaborating with global engineering teams and customers.

What You’ll Do: Lead BMS system definition, architecture, integration, and development for high-voltage battery applications. Translate customer, regulatory, safety, manufacturing, and service needs into clear system and component requirements. Define hardware-software interfaces, diagnostics, communications, operating limits, contactor and pre-charge controls, and fault responses. Maintain requirements traceability, technical specifications, interface definitions, validation plans, test cases, and engineering records. Develop and execute BMS and battery-system verification plans, including HIL/SIL, battery cycling, diagnostics, calibration, communications, environmental, and end-of-line testing. Support SOC, SOH, SOP/SOF, battery fault strategies, control logic, and model-based validation. Lead root-cause analysis, 8D/5 Why investigations, field issue resolution, and production troubleshooting. Coordinate engineering activities across systems, hardware, embedded software, mechanical, thermal, validation, quality, manufacturing, suppliers, and program management. Support functional safety, cybersecurity, RAMS, risk analysis, certification, commissioning, vehicle integration, and launch readiness. Work directly with customers and suppliers to resolve requirements, integration concerns, technical risks, and performance issues. What You Bring Bachelor’s degree in Electrical, Electronics, Computer, Systems, Automotive, Mechatronics, Embedded Systems Engineering, or a related discipline. Masters preferred. At least five years of experience in BMS, systems engineering, battery systems, electrified powertrains, or another high-reliability application; seven or more years is preferred. At least three years of direct BMS development, integration, or validation experience preferred. Experience with lithium-ion battery packs and high-voltage systems above 400V; experience with 400V–1000V architectures is strongly preferred. Strong understanding of BMS architecture, battery safety, diagnostics, controls, communications, requirements management, traceability, and V&V. Experience with CAN, CAN FD, J1939, UDS, CANalyzer, INCA, HIL systems, oscilloscopes, meters, battery cyclers, or related test tools. Working knowledge of functional safety, cybersecurity, DFMEA/FMEA/FTA, RAMS, hazard analysis, safety cases, and corrective-action methods. Strong technical writing, problem-solving, customer communication, and cross-functional leadership skills. Preferred Experience Railway, industrial battery, heavy-duty commercial vehicle, off-highway, bus, truck, fleet, construction, or passenger EV applications. ISO 26262, ASPICE, ISO 21434, EN 50126/50129/50657/50159, UN38.3, IEC 62660, UL 2580, ECE R100, or related standards. Commissioning, site integration, vehicle integration, field support, production launch, or customer issue resolution. Master’s degree in Battery Systems, Power Electronics, Embedded Systems, Automotive Systems Engineering, or a related field. Why OPmobility? Work on advanced battery systems supporting electrified mobility and decarbonization. Contribute across multiple markets rather than a single platform or application. Partner with global experts in systems, embedded software, electronics, validation, safety, manufacturing, and program management. Influence products from early requirements through validation, certification, launch, and field support. Develop within a global mobility organization committed to innovation, product quality, safety, responsible growth, and ethical business practices.

Benefits: OPmobility offers a comprehensive benefits package that start upon hire and includes medical, dental, and vision coverage; a 401(k) 5% employer match and core contribution; company-paid life insurance and long-term disability; paid vacation and holidays; an Employee Assistance Program; and optional supplemental benefits. Join OPmobility and help develop safe, reliable, production-ready battery systems for the next generation of mobility. At OPmobility, people truly matter. We are committed to building inclusive teams, promoting diversity and equality, and ensuring that every application is considered fairly - because the future of mobility is built by diverse perspectives, bold ideas, and people who dare to move forward. Innovation is therefore not a buzzword, but a natural part of everyday work. You’ll grow in an international environment where cutting-edge technologies, industrial excellence, and real-world impact come together to tackle the challenges of tomorrow’s automotive industry. Founded in 1946 by Pierre Burelle, OPmobility, known until 2024 as Plastic Omnium, has transformed itself into a player in sustainable and connected mobility. Today, OPmobility develops technological solutions across four areas of expertise: exterior and lighting systems, the integration of complex modules, technologies related to energy storage, hydrogen and electrification, and a division dedicated to the development of embedded software and digital solutions. With €11.5 billion in revenue in 2025, 152 factories, 40 R&D centers, and nearly 38,100 employees across 28 countries, OPmobility combines global scale with local impact. All driven by a shared ambition to accelerate the automotive energy transition.