Senior Power Electronics Engineer

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Full-Time Salary S4 Spec Para-Prof Longmont, CO, US

30+ days ago Requisition

Salary Range: $ To $ Annually

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

We are seeking a highly skilled Senior Power Electronics Engineer to design and develop industrial battery chargers, inverters, and related accessories across a wide power range (150W to 100kW) for critical power applications. This role spans the full product lifecycle from concept development and design through production launch and ongoing support and requires deep technical expertise in power conversion and embedded control systems.

• Design, analyze, simulate, prototype, and validate power conversion systems and topologies.
• Develop and implement both analog and digital control loops.
• Create and maintain technical documentation, including product specifications, schematics, and interface control documents.
• Conduct design reviews and collaborate cross-functionally with Engineering, Manufacturing, and Quality teams.
• Support product transition to manufacturing, including design for manufacturability and test readiness.
• Troubleshoot and resolve complex issues in production and field environments.
• Mentor and support the development of team members, contributing to a culture of continuous improvement.

• Bachelor’s degree in Electrical Engineering with 8+ years of power conversion experience OR a Master’s degree with a focus in Power Electronics and 6+ years of power conversion experience.
• Proven experience designing power conversion systems, including active front-end designs for single and three-phase AC inputs.
• Strong understanding of isolation requirements, including creepage and clearance standards (UL, IEC).
• Experience with EMI/EMC design, compliance, filtering, and troubleshooting.
• Deep knowledge of power semiconductor devices (MOSFETs, SiC, GaN), gate drivers, and protection circuits.
• Proficiency in analog and power circuit simulation tools (e.g. LTspice).
• Strong foundation in control theory, including design, modeling, and stability analysis of control loops.
• Experience with thermal design and analysis (heat sinking, airflow, and loss modeling).
• Knowledge of magnetics design, including transformers and inductors (core selection, winding techniques).
• Experience with isolated and non-isolated bidirectional topologies (DAB experience strongly preferred).
• Hands‑on experience with lab instrumentation (oscilloscopes, power supplies, electronic loads, network analyzers).
• Demonstrated success bringing products from concept through volume production.
• Strong collaboration and communication skills with the ability to work effectively across teams.

• Experience designing and certifying grid‑tied systems to UL 1741.
• Knowledge of phase‑locked loops (PLL) for grid synchronization.
• Experience with large‑scale battery energy storage systems (BESS), UPS systems, and battery charging applications.
• Advanced programming skills in embedded C/C++.

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

Relocation assistance is available for this position.

Base Compensation: $170,000 - $200,000 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: June 30th. 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.

• Free gym with 24/7 access
• Free Electric Vehicle charging
• Break…