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).

Founded in 1972, SES is a premier provider of engineered solutions and professional consulting services across an extraordinary range of engineering disciplines. SES offers battery testing and analysis services to clients in energy storage, consumer products, automotive and EV, electric flight, defense, and medical sectors throughout the U.S. and internationally�so the problems we solve (and the tests we run) are always changing. We�re known for deep technical expertise and proven performance in instrumentation and testing, failure analysis, reliability and predictive engineering, materials science, solid mechanics and structural design, heat transfer, fluid mechanics, floating systems, and forensics. Our reputation speaks for itself: over 80% of our work comes from repeat clients and referrals.

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.

SES 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 personal and collective accountability to earn trust and deliver results.

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

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 Human.Resources@Stress.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.

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Stress Engineering Services

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Battery Testing Engineer