Senior Engineer, Battery Systems

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You’ve discovered something special. A company that cares. Cares about leading the way in construction, engineering, manufacturing and renewable energy. Cares about redefining how energy is designed, applied and consumed. Cares about thoughtfully growing to meet market demands. And ─ as “one of the Healthiest 100 Workplaces in America” ─ is focused on the mind/body/soul of team members through our Culture of Care.

We are seeking a Lead Battery Systems Engineer to join our R&D organization and drive innovation in stationary energy storage solutions. This role will focus on the design, development, and validation of advanced battery systems for UPS, C&I, and BESS applications. You will lead system-level testing, create validation plans, and collaborate across disciplines to ensure performance, reliability, and safety of integrated battery systems.

• Bachelor’s degree in electrical, Mechanical, Chemical, or related engineering discipline.
• 5+ years of experience in battery system design, architecture, testing, or integration for stationary applications (UPS, BESS, C&I).
• Strong knowledge of lithium-ion chemistries, battery architectures, and failure modes.
• Hands‑on experience with battery testing and validation protocols.
• Familiarity with compliance standards and safety regulations for stationary battery systems.
• Excellent communication skills for cross-functional collaboration and stakeholder engagement.
• Strong communication skills to provide clear recommendations and guidelines to stakeholders, technical development teams, and testing teams

• Master’s degree in electrical, Mechanical, or Chemical Engineering.
• Experience with DFMEA, root cause analysis, and reliability engineering.
• Knowledge of aging analysis, end-of-life behavior, and thermal management strategies.
• Experience with performance modeling tools (MATLAB/Simulink, Simscape) and FEA/CFD for thermal and structural analysis.

Travel: 5-10%

Work Schedule:

This position works between the hours of 7 AM and 5 PM, Monday
- Friday. However, work may be performed at any time on any day of the week to meet business needs.

Work Location:

Onsite
- Menasha, WI

• Participate in system-level testing of integrated battery systems for UPS, microgrid, EV charging, and data center applications.
• Develop test plans and protocols to validate battery performance, life, and reliability at cell, module, and pack levels.
• Conduct and document DFMEA and failure mode analysis for battery systems.

The job description and responsibilities described are intended to provide guidelines for job expectations and the employee's ability to perform the position described. It is not intended to be construed as an exhaustive list of all functions, responsibilities, skills, and abilities. Additional functions and requirements may be assigned by supervisors as deemed appropriate.

Applicants must be authorized to work for ANY employer in the U.S. We are unable to sponsor or take over sponsorship of an employment Visa at this time other than the TN1 Visa (Canadian).

Faith Technologies, Inc. is an Equal Opportunity Employer – veterans/disabled.

We provide industry-leading benefits as an investment in the lives of team members and their families. You’re invited to review the full list of FTI benefits available to regular/full-time team members. Start here. Grow here. Succeed here. If you’re ready to learn more about your career with FTI, apply today!

• Mid‑Senior level

• Full-time

• Information Technology

• Construction