Mechanical Engineer at Stored Energy Systems (SENS)

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. 

Summary

We are looking for a Mechanical Engineer with experience in cooling and packaging electronic components to join our engineering team and to build on our successful line of power products. This individual will help design and develop industrial battery chargers and inverters, engine starting systems, and DC back-up power systems 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

• Develop innovative enclosures at both the PCB and system (cabinet) level, using sheet metal, plastic, and die-castings that meet challenging size, cost, and thermal/cooling requirements.
• Work with other engineers to define and model assemblies and associated components, including printed circuits boards, in SolidWorks to ensure fitment and proper cooling.
• Complete thermal modeling and designs in SolidWorks to maximize cooling and limit component temperatures for operation in industrial and outdoor environments.
• Analyze and test designs to meet engine and seismic vibration requirements.
• Specify wire assemblies, harnesses, and thermal components in electrical assemblies.
• Specify materials, finishes, hardware, components, fixtures, labels, and graphics.
• Participate in the validation, testing, and production release of mechanical components/assemblies.
• Conduct peer to peer and cross-functional design reviews.
• Create technical documentation throughout the development process including specifications, mechanical drawings, Bill of Materials, and assembly documents. 
• Provide problem resolution support for production and field issues as needed.
• Design improvements and updates to existing products.

Required Qualifications

• Bachelor’s degree in Mechanical Engineering or similar related field. 
• 5+ years of relevant experience.
• Experience cooling high power electronics. 
• Advanced knowledge of 3D CAD modeling software with experience in electronics assembly design and packaging of physical components.
• Experience designing sheet metal, plastic, and die castings components and assemblies.
• Basic knowledge of electrical components including circuit breakers, wiring, and terminal blocks.
• Ability to independently design functional, aesthetic, manufacturable, and cost-controlled components.
• Experience taking a design from concept into volume production.
• 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 SolidWorks Flow Simulation to complete thermal modeling and designs.
• Familiarity with UL safety standards, seismic, and vibrating testing. 

Location: This position is located in Longmont, CO with the opportunity to work a hybrid schedule.

Base Compensation: $100,000 - $115,000 is the projected compensation range for this role depending on the candidate’s overall qualifications and experience. 

Closing Date: October 31st. 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.

We offer an exciting and competitive total compensation package designed to inspire! This includes generous paid time off, holidays, as well as comprehensive benefits including medical, dental, vision, short-term disability, life insurance, and an outstanding 401k matching program where employees are instantly vested.

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.

At SENS, 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.