Power Systems Engineer – AC/DC Backup Power

Stored Energy Systems LLC (SENS); Longmont (CO); Hybrid; USD 125,000 - 145,000; Full time

Benefits offered by this job

Gym access

EV charging

Café meals

Grab & Go snacks

Basketball court

Walking paths

Job summary

Stored Energy Systems (SENS) in Longmont, CO seeks an experienced power systems engineer to design industrial AC/DC back‑up systems and deliver products from concept through production release.

You will design chargers, inverters, monitoring, batteries, and wiring, perform load and short‑circuit calculations, and ensure compliance with UL 508A, UL 1012, UL 1236, NFPA 70, and related standards.

Qualifications

• 5+ years of experience designing industrial power systems.
• Bachelor's degree in Electrical Engineering or related field.
• Experience with NEC/NFPA 70 and electrical safety standards.

Responsibilities

• Design and develop industrial indoor/outdoor back-up power systems (chargers, batteries, monitoring, distribution, inverters).
• Create wiring diagrams and BOMs detailing equipment, connections, wire gauges, busbars, breakers, and fans.
• Perform load calculations, conductor sizing, short-circuit calculations, and derating.
• Ensure designs comply with UL 508A, UL 1012, UL 1236 and NFPA 70.
• Support validation testing and production release of electrical designs.
• Participate in peer reviews and cross-functional design reviews.
• Provide issue resolution support for production and field issues.

Skills

Industrial power design

Electrical engineering

AC/DC power circuits

NFPA 70 knowledge

One-line drawings

Breakers sizing

UL standards familiarity

Education

Bachelor's degree in Electrical Engineering

Tools

SolidWorks Electrical

Job description

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 .

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

We are looking for an experienced power systems engineer with extensive experience in designing industrial AC and DC power back-up systems to join our engineering team and to build on our successful line of power products This individual will design and develop industrial power systems incorporating battery chargers, inverters, monitoring products, batteries, protection, distribution, transfer, and other electrical equipment across a wide power range (150W to 100kW). This person will be involved from concept investigation and design, through successful production launch and support of these products.

Responsibilities

• Design and develop industrial indoor / outdoor back-up power systems containing chargers, batteries, battery monitoring, AC & DC power distribution, transfer switches, inverters, and other equipment.
• Create detailed electrical wiring diagrams and bill of materials specifying all the required equipment, batteries, electrical connections, wire gauges, busbars, breakers, fans, and other equipment required.
• Perform load calculation, conductor sizing, short circuit current calculations, and component de-rating calculations.
• Ensure designs are in compliance with national and international standards including UL 508A, UL 1012, UL 1236.
• Participate in the validation testing, and production release of electrical designs.
• Conduct peer to peer and cross-functional design reviews.
• Provide problem resolution support for production and field issues as needed.

Required Qualifications

• 5+ years of experience in industrial power systems design.
• Bachelor’s degree in electrical engineering or similar related field.
• Experience designing industrial electrical control and power systems.
• Strong understanding of AC / DC power circuits, circuit protection, system wiring and terminations, power supplies, and batteries.
• Experience with electrical wiring, breaker sizing, and one-line drawings.
• Working knowledge of the National Electrical Code (NFPA 70) related to the design of equipment.
• Experience developing electrical products from concept through validation, production release, and ongoing manufacturing support.
• Highly organized with strong analytical skills.
• Flexible team player who actively establishes and maintains effective working relationships and who is willing to multi-task and help wherever needed.

Preferred Qualifications

• Experience with UL Standards for Industrial Control Panels (UL508A) or similar industrial safety standards.
• Certified UL 508A Manufacturers Technical Representative (MTR).
• Familiarity with SolidWorks Electrical software.

Location

This position is located in Longmont, CO with flexibility to work a hybrid schedule once fully trained.

Base Compensation

$125,000 - $145,000 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

11/30. 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.