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.

Littelfuse is seeking a Lead Solutions Systems Architect to drive the system architecture and application strategy for our semiconductor solutions within the rapidly growing Battery Energy Storage Systems (BESS) market.

In this strategic role, you will define how our technologies are integrated into utility-scale energy storage solutions, including emerging Solid State Transformer (SST) architectures. You'll collaborate with customers, Product Management, R&D, and Application Engineering to shape next-generation solutions that accelerate innovation and enable the future of energy.

What You'll Do

• Define and evolve system-level architectures for Battery Energy Storage Systems (BESS), including:
  • Power Conversion Systems (PCS)
  • Inverter topologies
  • Protection strategies
  • Emerging Solid State Transformer (SST) designs
• Translate customer requirements, market trends, and competitive insights into scalable solution roadmaps.
• Partner with Product Management and R&D to define future semiconductor product requirements.
• Serve as the technical authority during customer engagements with OEMs and system designers.
• Develop reference architectures, technical collateral, and solution blueprints.
• Support Application Engineering and Field Application Engineers on complex customer challenges.
• Influence technology strategy, design wins, and long-term business growth.
• Represent Littelfuse through technical presentations, publications, and industry conferences.

What You'll Bring

Required Qualifications

• Bachelor's or Master's degree in Electrical Engineering, Power Electronics, or a related field.
• 8+ years of experience in:
  • Power Electronics
  • Battery Energy Storage Systems (BESS)
  • Semiconductor applications
• Strong expertise in:
  • System-level power conversion architectures
  • Inverters, converters, and grid-connected systems
  • Semiconductor technologies including Si, SiC, and GaN
• Experience collaborating across customers, Product Management, and R&D.
• Demonstrated success influencing technical direction with OEMs or strategic customers.
• Expertise with multi-level inverter topologies (NPC, ANPC, etc.).

Preferred Qualifications

• Experience with utility-scale BESS or Power Conversion Systems (PCS).
• Knowledge of Solid State Transformers (SST) or next-generation energy conversion technologies.
• Experience developing system architectures or application roadmaps.
• Proficiency with PLECS, MATLAB/Simulink, or similar modeling tools.
• Familiarity with standards such as UL 9540, UL 1741, IEC 62933, and grid interconnection requirements.
• Experience presenting at technical conferences or publishing industry papers.

Littelfuse is an equal opportunity employer committed to empowering every associate to make a difference — everywhere, every day.

We offer a comprehensive benefits package, including:

• Medical, dental, and vision coverage

• 401(k) with company match and annual contribution

• Paid time off and 11 holidays

• Flexible and remote work options

• $850 Lifestyle Spending Account

• Tuition reimbursement (up to $20,000)

• Lean Six Sigma certification and career development opportunities

• Life, disability, and voluntary insurance options

Artificial Intelligence (AI) tools may be used in some portions of the candidate review process for this position; however, all final employment decisions will be made by a person.

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Artificial intelligence (AI) tools may be used in some portions of the candidate review process for this position, however, all final employment decisions will be made by a person.

Salary Range:

$123,100 - $190,780

The salary offered will vary depending on your location, job-related skills, knowledge, and experience.

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.