Senior Systems Engineer 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 an experienced Systems Engineer with a strong product compliance focus to join our engineering team and help develop the next generation of industrial power products. This role is broader than a traditional compliance-only position: the engineer will translate customer, regulatory, and internal needs into clear system requirements, architectures, verification plans, and compliant product designs.

The Senior Systems Engineer will contribute across the full product lifecycle, from concept investigation and feasibility assessment through design, integration, certification, production launch, and ongoing product support. The role works at the center of electrical, mechanical, firmware/software, sales, manufacturing, product management, and external certification partners to ensure SENS products are reliable, manufacturable, certifiable, and clear in their technical intent.

SENS products include industrial power systems, battery chargers and inverters, engine starting systems, and DC back-up power systems across a wide power range from 150W to 100kW.

Responsibilities

• Translate high-level product needs into system-level specifications, design requirements, interface requirements, and verification criteria that guide engineering decisions.
• Develop and maintain validation and compliance test matrices for assigned products and platforms.
• Identify technical, compliance, and programmatic risks early in the design process; assess tradeoffs and help develop mitigation plans that reduce risk to schedule, cost, quality, and certification.
• Interpret and apply complex safety, EMC, performance, and environmental standards and codes to SENS product designs.
• Provide actionable compliance design requirements such as pollution degree, creepage and clearance, hipot voltages, thermal limits, circuit protection, wiring, terminations, and enclosure requirements.
• Coordinate product compliance submittals, testing, follow-up service reports, and maintenance with certification agencies such as UL, seismic certification bodies, ABS, and others.
• Perform compliance assessments, testing, and documentation for self-declarations and customer requirements, including CE marking, NFPA 110, RoHS, REACH, Conflict Minerals, and related obligations.
• Define and maintain traceability between requirements, design elements, compliance obligations, and verification activities.
• Support system architecture definition across hardware, software, interfaces, wiring, data flows, and product-level dependencies.
• Coordinate integration activities across electrical, mechanical, firmware/software, manufacturing, and documentation teams to ensure subsystems work together as intended.
• Plan and support system-level testing to confirm that products meet functional, reliability, regulatory, and customer requirements.
• Facilitate peer-to-peer and cross-functional design reviews to ensure designs satisfy system requirements and regulatory expectations.
• Generate and maintain customer-facing technical specifications, specification tables, and specifying engineer documentation as needed.
• Maintain compliance test equipment, calibrations, procedures, and working knowledge of standards changes that apply to SENS products.

Required Qualifications

• Bachelor's degree in electrical engineering, systems engineering, or a closely related technical field.
• 5+ years of relevant engineering experience in systems engineering, product engineering, regulatory compliance, or certification for hardware-based products.
• Strong understanding of AC/DC power circuits, circuit protection, system wiring and terminations, power supplies, batteries, and industrial power products.
• Experience translating customer, regulatory, and product needs into clear requirements, specifications, design inputs, and verification plans.
• Working knowledge of safety, EMC, performance, and environmental standards that apply to industrial electrical equipment and power conversion products.
• Working knowledge of the National Electrical Code (NFPA 70) as it relates to equipment design.
• Experience interpreting standards and converting them into practical design, documentation, and test requirements.
• Strong troubleshooting, root-cause analysis, systems-level thinking, problem solving, time management, and critical thinking skills.
• Highly organized and able to manage multiple priorities under time pressure while maintaining attention to technical detail.
• Excellent communication skills and the ability to work effectively across engineering, sales, manufacturing, product management, customers, and certification agencies.
• Customer-focused and reliability-focused mindset with a strong commitment to product quality and engineering process discipline.

Preferred Qualifications

• Experience with industrial battery chargers, DC power systems, inverters, engine starting systems, energy storage systems, or related power conversion products.
• Product certification experience with UL, seismic, ABS, CE marking, or similar certification and compliance programs.
• Experience with standards such as UL 1012, UL 1236, UL 508A, UL 1973, and UL 1745.
• Experience developing requirements traceability, system architecture documentation, validation matrices, or specifying engineer documentation.
• Experience supporting products from concept and feasibility through certification, production launch, and field support.

Closing Date: July 15th. 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.

Location: This position is on-site in Longmont, CO and is not available for remote work.

Base Compensation: $120,000 - $150,000 is the projected compensation range 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.

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 requirement listed in this job description, we still encourage you to apply.