Senior Engineer, Battery Systems

FTI; Menasha (WI); On-site; USD 90,000 - 120,000; Full time

Job summary

Faith Technologies Inc. is seeking a Senior Battery Systems Engineer to join our R&D team, focusing on innovative stationary energy storage solutions. This role involves systems design, development, and performance validation for UPS and battery storage applications.

The ideal candidate will have a Bachelor's degree in engineering, significant experience with battery system design, and strong communication skills for cross-functional collaboration. This position offers flexibility and a supportive work environment in Menasha, WI or Phoenix, AZ.

Qualifications

• 5+ years of experience in battery system design and testing.
• Strong knowledge of failure modes in battery systems.
• Hands-on experience with compliance standards for battery systems.

Responsibilities

• Participate in system-level testing of integrated battery systems.
• Develop test plans to validate battery performance and reliability.
• Conduct DFMEA and failure mode analysis for battery systems.

Skills

Battery system design

Testing and validation protocols

Communication skills

Knowledge of lithium-ion chemistries

Education

Bachelor’s degree in electrical, mechanical, chemical engineering

Master’s degree in related fields (preferred)

Tools

MATLAB/Simulink

FEA/CFD tools

Job description

A company that cares about leading the way in construction, engineering, manufacturing and renewable energy, redefining how energy is designed, applied and consumed, and growing thoughtfully to meet market demands.

Faith Technologies Inc. (FTI) is looking for a Senior Battery Systems Engineer to join our R&D organization and drive innovation in stationary energy storage solutions for our Product Engineering team located in Phoenix, AZ or Menasha, WI. The role focuses 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.

About The Product Engineering Team

Our Product Engineering Team sits at the intersection of innovation and execution, transforming ideas into real‑world products and solutions for Excellerate Products, a division of Faith Technologies. From early concept through full‑scale production, engineers design Data Center power distribution products, Electric Vehicle charging skids, switchboards and more. With a strong focus on quality, manufacturability, and customer outcomes, we ensure every product is engineered to perform safely, reliably, and at scale.

Minimum Requirements

• 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.

Preferred Requirements

• 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: The role requires onsite work from our Menasha, WI or Phoenix, AZ office. Onsite roles include a high level of workplace and schedule flexibility to support a healthy work‑life balance.

Key Responsibilities

• 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.
• Define system‑level requirements for size, performance, cost, and compliance for stationary battery systems.
• Maintain technical documentation, including specifications, selection analysis, and simulation reports.
• Collaborate with simulation, thermal, and mechanical engineers to define modeling requirements and validate battery architectures.
• Partner with controls and software teams to establish guidelines for BMS design and integration.
• Evaluate and benchmark new chemistries and competitive technologies to ensure best‑in‑class performance.
• Support verification and validation activities by defining DVP&R for battery system testing.
• Ensure compliance with industry standards (UL 9540A, UL 1973) and lead risk assessments for product safety.

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.