Battery Testing Engineer

Job Description

Job Description

Do you learn best by taking things apart, or pushing them until they fail? Are you the engineer who can’t help but ask why something works… and how it could work better? If so, you’ll feel right at home at Stress Engineering Services, Inc. (SES).

About Stress Engineering Services

Stress Engineering Services (SES) is an elite, one-of-a-kind engineering consulting firm, trusted for more than 50 years to solve the problems others can’t. Our reputation is built on an uncompromising commitment to technical excellence, a highly selective team of experts, and a track record of delivering answers in the most complex, high-stakes environments. We operate at the intersection of deep technical expertise and real-world application, partnering with clients across energy, aerospace, consumer products, medical, and beyond. Our teams combine advanced analysis with hands-on testing, failure analysis, and practical engineering judgment to deliver solutions that perform where it matters most—in the field. As an employee-owned company, our people are personally invested in every outcome, creating a culture where accountability is high and excellence is the standard. We don’t just solve problems—we uncover root causes, mitigate risk, and deliver confidence.

For our clients, that means a trusted partner known for rigor and results. For our people, it means joining an elite team tackling the most meaningful challenges in engineering.

SES is where complex problems meet uncommon solutions—and where elite engineers come to do their best work.

Our Core Values

• We Over Me – We put the mission, our clients, and our team ahead of individual agendas
• Unyielding Pursuit of Excellence – Excellence is the standard. We deliver the right solution, on time, every time
• Own It – We take accountability to earn trust and deliver results

The Role

As a Test Engineer at SES, you’ll turn complex questions into meaningful data. This role blends mechanical and electrical engineering fundamentals with hands on testing and system operation in a dynamic, industrial laboratory environment. You’ll plan and execute custom tests, design fixtures and methods, instrument hardware, collect high quality data, and transform results into clear, actionable insights.

Battery projects span testing and analysis of cells, modules, and packs in diverse applications across various sectors. The common thread: understanding how a system is supposed to perform, and prove whether it actually does.

Key responsibilities include:

• Developing custom and specialized test plans, fixtures, and test methods
• Executing tests safely and efficiently while monitoring live data
• Collecting, analyzing, and documenting high quality test data
• Interpreting results and producing clear, concise technical reports

What Success Looks Like

Successful Test Engineers at Stress are adaptable problem solvers who thrive in both independent and collaborative environments. You’re hands on, mechanically curious, and comfortable working with electrical, mechanical, and chemical systems. You can safely navigate a heavy industrial lab setting, juggle competing priorities, and keep projects moving forward—even when tests don’t go as planned.

Strong communication skills are essential. You’ll routinely interact with teammates and clients, translating technical details into clear verbal explanations and well written test methods and reports. Experience in battery testing, energy storage, EV systems, or other safety-critical and regulated industries is a plus. Depending on your experience, you may also take the lead on managing projects, interfacing directly with clients, and guiding the work of other engineers and technicians.

A Day in the Life

No two days are the same, and that’s exactly what makes this role rewarding. Your morning might start with a technical discussion alongside engineers, technicians, and clients, refining a test concept or identifying instrumentation and risk considerations. You may review drawings, finalize a test plan, or troubleshoot an unexpected challenge that requires creative thinking and mechanical intuition.

Before long, you’re in the lab, instrumenting hardware, coordinating with technicians, monitoring live data, and adapting on the fly. Sometimes that means pushing systems to their limits… breaking them or even blowing them up (intentionally) to uncover answers that simply can’t be found any other way, particularly when characterizing battery thermal behavior, abuse response, or failure mechanisms. Throughout the day, you balance safety, schedule, and performance while managing risk in real time. By day’s end, you can see tangible progress: data collected, questions answered, and another complex test successfully executed. It’s hands-on, fast paced, occasionally chaotic, and deeply satisfying work that keeps Test Engineers at SES excited to come back every day.

Basic Qualifications

• BS in Mechanical Engineering with 3–5 years of experience in testing or manufacturing / industrial equipment operations
• Experience with electrical/mechanical testing methods and instrumentation
• Hands on aptitude and comfort working with physical systems
• Experience with data acquisition and test control systems
• Ability to conceptualize and develop test methods, fixtures, and equipment with attention to accuracy and repeatability
• Strong technical writing and communication skills
• Highly motivated, self-starter with strong critical thinking and problem solving abilities
• Familiarity with statistical techniques for reliability, capability analysis, regression, ANOVA, and sample size justification (plus)
• Experience with CAD software (SolidWorks or similar)
• Professional Engineer license or willingness to obtain one

Preferred Qualifications

• MS in Engineering or more than 5 years of relevant experience
• Knowledge of material properties and failure mechanisms for metals and polymers under mechanical, thermal, electrical, and environmental loading
• Experience with electrochemistry and battery energy storage fundamentals
• Experience developing test plans and reports suitable for verification, validation, and compliance documentation
• Experience validating test methods for repeatability and reproducibility
• Familiarity with hazard and risk assessment tools such as FMEA or fault tree analysis
• Experience with battery safety standards and regulations (e.g., UL, IEC, UN, SAE, or similar)
• Experience or familiarity with numerical simulation methods such as finite element or computational fluid dynamics analysis

Why Join SES?

• High autonomy, high impact technical work
• Direct influence on real world safety and performance
• Collaboration with world recognized subject matter experts
• Supportive, entrepreneurial, employee-owned culture
• Thought leadership, shaping the field

What’s in It for You?

At SES, curiosity is encouraged and technical depth is valued. You’ll work alongside some of the brightest engineers in the industry on challenges that truly matter, including technologies that enable safer, more reliable, and more sustainable energy systems.

As an employee-owned firm, we offer:

• Competitive compensation aligned with experience and market benchmarks
• Medical, dental, and vision coverage
• Paid time off and paid holidays
• A collaborative, inclusive, and technically challenging environment

Our Commitment

SES is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender identity, sexual orientation, national origin, genetics, disability, age, veteran status, or other protected characteristics.

At SES we take pride in fostering an inclusive and dynamic workplace that values diverse perspectives and experiences. This position requires legal authorization to work in the U.S. Candidates must be able to provide the necessary documentation to verify identity & employment eligibility through the I-9 verification process.

Recruitment Process Disclosure:

As part of your candidacy and potential future employment, you agree to maintain the confidentiality of certain information. This includes not disclosing, sharing, or discussing any proprietary, sensitive, or client-related information obtained through your interactions with Stress Engineering Services. Whether through interviews, onboarding, or employment, you are expected to treat all company and client information as confidential and protected. This obligation applies during and after your engagement with us. By continuing in the hiring process, you acknowledge and agree to these terms of confidentiality and non-disclosure.

As part of our hiring process, Stress Engineering Services may use technology tools, including automated tools, to help organize, review, or evaluate application materials and interview-related information. These tools are used to support our recruiting process, but hiring decisions are not made solely by technology. If you would like to request a reasonable accommodation or would like additional information about the process, please contact View email address on ziprecruiter.com. Where required by law, we will provide additional notices if a specific tool analyzes interview responses, assessments, or other information as part of your evaluation .

EEO/Vet/Disabled Employer