Sr. BESS Systems Architect

Littelfuse (NASDAQ: LFUS) is a diversified industrial technology manufacturing company shaping solutions for the safe and efficient transfer of electrical energy. Headquartered in Chicago, Illinois, USA, we serve customers across industrial, transportation, and electronics markets worldwide. With approximately 16,000 employees we design and manufacture innovative technologies that support electrification, energy efficiency, and advanced automation. Our global reach is matched by a culture that empowers innovation and long-term growth. Guided by our principles We Care, We Succeed With Our Customers, and We Own the Outcome, we work collaboratively, think boldly, and deliver solutions that move industries forward. The System Architect for Energy Storage Systems is responsible for defining, optimizing, and governing the end‑to‑end technical architecture of our battery energy storage platform—from cell and module design through rack, container, PCS, controls, protection, and MV grid interface. This role ensures that all subsystems integrate into a safe, reliable, high‑performance, and commercially competitive product tailored to regional market requirements. Serves as the technical authority for system‑level decisions, bridging engineering and product management. Work alongside other System Architects to develop a global view (APAC, EMEA, AMER) and align global architecture standards with local codes, grid requirements, customer applications, and competitive landscapes. Develop technical papers, based on research and new technologies deployments. Present material at conferences and engage with customers to further improve our solutions. About the Job Map current and future customer systems: Engage with customers to understand current system designs. Create maps of top 3 to 5 customers (targets) Develop roadmap of future solutions based on product developments. Littelfuse Product Roadmap: Work alongside product managers and engineers to align product gaps and deficiencies. Develop current and future product needs. Update system maps to include product development and launch dates. Work alongside leadership to develop commercial maps and new business opportunities which will turn into revenue. Sales Support and Customer engagement Produce technical white papers which demonstrate Littelfuse’s product and system leadership. Attend customer meetings and receive validation of solutions. Be the Littelfuse subject matter expert and present technical system designs at various conferences in Region. Success: Monitor and report customer engagement, new findings for product development Report current progress and design-in “wins” to management About You Bachelor’s degree in Engineering, or a related field (technical background preferred) ; MSEE is highly desirable. Minimum of 10+ years of experience in the BESS market or adjacent energy storage, power electronics, or renewable energy sectors. Deep technical and commercial understanding of BESS architectures, safety systems, power conversion, protection technologies, standards, and emerging trends. Experience working directly with major OEMs, integrators, and utilities. Excellent communication and executive-level presentation capabilities. Ability to travel 30-50% globally. #LI-AS1 At Littelfuse, we support employee growth and development. Guided by our culture principles, our teams work together to deliver value for customers and make a positive impact in the communities where we operate. We are an equal opportunity employer committed to fostering an inclusive workplace where everyone has the opportunity to grow and contribute. We offer competitive compensation and benefits, performance-based incentives, flexible work arrangements, and development opportunities. Our humble roots date back to 1927, where, in the back of a garage on Chicago’s northside, our founder, Edward Sundt, developed a small, fast-acting, protective fuse for use in sensitive test meters. Sundt wanted to call his new company producing these small fuses, “Little Fuse,” but wasn’t allowed to trademark two such common words. So, instead he went with the one-word, misspelled “Littelfuse.” For more than 95 years, Littelfuse has pioneered innovative products that help empower a sustainable, connected, and safer world. With the ever-evolving electrification and electronification of customer applications, our product technologies are closely linked to sustainable applications such as electric vehicles and EV charging infrastructure, renewable energy and energy storage, factory automation, power management and more. Throughout our history, our people have been the foundation of our success — and that remains true today. Now more than ever, our bright and talented people are a strategic advantage for the company. From the production line to the engineering lab, the office or distribution center, Littelfuse people are an important part of a diverse, talented team of the best and brightest in the industry. While Littelfuse has experienced tremendous growth in recent years, we still maintain a small-company, entrepreneurial approach where your efforts will drive our culture, our business, and the overall success of the organization. No matter where you work or what you do, your contributions will make a difference at Littelfuse — everywhere, every day. Littelfuse is an Equal Opportunity/Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, gender identity, sexual orientation, disability, protected veteran status, and/or any other protected class under federal, state, or local law.