NPI Test Engineer IV in Longmont, Colorado at Stored Energy Systems

Who We Are

Stored Energy Systems (SENS) is an award-winning manufacturer of premium quality power conversion products located in Longmont, CO. In business for over 50 years, SENS is the market leader with a proven track record of providing highly reliable battery chargers, DC power systems, and related products to industrial markets. For more information on our company please see our web site at www.sens-usa.com.

View the SENS Product Catalog

Summary

SENS is seeking a self-motivated New Product Introduction (NPI) Test Engineer to join our engineering team. This individual will work with Engineering and Production to test and release new products, ensuring manufacturing readiness and the highest level of reliability and continuous flow of manufactured product without defects.

Responsibilities

• Develop new product test plan and instructions for the Production environment to ensure products are tested correctly every time.
• Write software functions used to calibrate, configure and test products in Production.
• Facilitate new product hand-off to Production including test instructions, test equipment design and configuration, and manufacturing test operator training.
• Develop fixturing to support test in Engineering, Production and at vendor facilities.
• Develop customer-facing product test records.
• Collaborate in planning and prioritization for test plan creation, design, implementation, and execution phases.
• Occasionally support Engineering new product validation team to ensure product operates according to specifications.
• Analyze test data to identify patterns, detect anomalies, and provide insights to improve product design.

Required Qualifications

• Bachelor’s degree in Electrical Engineering, Computer Engineering or equivalent in a technical field of study.
• 8+ years of experience in NPI, Manufacturing Test Engineering, Product Industrialization, or Production Engineering.
• Proven experience supporting product test from design release through pilot builds, production qualification, and full-scale manufacturing.
• Experience leading manufacturing readiness activities, production ramps, and product launch coordination across Engineering, Manufacturing, Quality, Supply Chain, and Operations.
• Strong Design for Test (DFT) review experience.
• Experience identifying manufacturing defects risks, driving issue resolution, and implementing corrective actions during product launches.
• Proven ability to investigate failures, perform root cause analysis, validate corrective actions, and support troubleshooting efforts.
• Experience working and communicating with test equipment such as voltmeters, data acquisition systems, o-scopes, load banks and similar instruments to make manual and automated measurements.
• Experience with software programming and basic ability to develop functions and read and step through code to determine where issues exist.
• Ability to read and understand electrical schematics and mechanical part drawings.
• Excellent problem-solving, decision-making, communication (written and verbal), and interpersonal skills for articulating technical approaches and progress to both technical and non-technical audiences.

Preferred Qualifications

• Experience in test and/or new product introduction in a manufacturing environment.
• In-depth knowledge of critical power genset backup, charger/battery systems or battery monitoring.
• Advanced software programming knowledge and experience in C#.

Location: This position is located on-site in Longmont, CO.

Base Compensation: $130,000 - $160,000 is the projected range of annual base salary for this role depending on the candidate’s overall qualifications and experience.

Bonus: This position is eligible for an annual bonus based on individual and company performance.

Closing Date: August 1st. While we expect to keep the position open through this date, the posting may be extended or closed early based on applicant volume and hiring needs.

Onsite Perks

• Free gym with 24/7 access
• Free Electric Vehicle charging
• Breakfast and Lunch Café
• After hours Grab & Go snacks
• Basketball court
• Walking paths

Benefits

• Paid Time Off
• Paid holidays
• Medical insurance
• Dental insurance
• Vision insurance
• Short-term and long-term disability
• Life insurance
• 401(k) plan with immediate vesting
• Employee referral program

At SENS, our culture is rooted in a set of core values that reflect who we are and how we work. In a recent 2025 poll, our employees identified the values that best define us: “Innovative”, “Respectful”, “Inviting”, “Flexible”, “Collaborative”, and “Growth Driven”. Our team describes us as a dynamic, forward-thinking company where everyone has the opportunity to thrive.

We pride ourselves on being an equal opportunity employer, fully dedicated to fostering inclusion and diversity. We welcome all applicants, regardless of race, color, religion, sex, sexual orientation, gender identity, genetic information, national origin, age, disability, veteran status, or any other legally protected characteristic.

We hope you're interested in making a difference with us. Even if you don't feel that you meet every qualification listed in this job description, we still encourage you to apply.