Sr Electrical Engineer – EV Power Systems & Energy Integration

The Sr Electrical Engineer is responsible for the design, development, and validation of medium-voltage electrical systems and components used in Battery Energy Storage Systems (BESS) and commercial electric vehicle (EV) platforms.

About our Client, Coulomb Solutions Inc. (CSI):

At Coulomb Solutions Inc., we are on a mission to help transform the world by enabling the fast adoption of commercial electric vehicles powered by green, sustainable energy. As a leading supplier of lithium-iron-phosphate battery systems and EV components, CSI is at the forefront of advancing technologies that are shaping the future of transportation. Headquartered in Livermore, CA, we are expanding our manufacturing footprint, and we want YOU to be part of our growing, dynamic team!

• Join an exciting, innovative company dedicated to environmental sustainability.
• Work in a fast-paced, collaborative environment that values your input and ideas.
• Contribute to the transition to a pollution-free planet while advancing your career.

The Sr Electrical Engineer is responsible for the design, development, and validation of medium-voltage electrical systems and components used in Battery Energy Storage Systems (BESS) and commercial electric vehicle (EV) platforms. The role focuses on component design, development, validation, and system integration of components such as inverters, converters, wiring harnesses, transformers, charging systems, and power distribution equipment.

The Senior Electrical Engineer will work on the development of both EV-related systems and stationary energy systems. Vehicle systems include new electric drive systems for heavy-duty vehicles, including trucks, buses, boats, trains, port equipment, airport GSE, and other commercial vehicle applications. CSI also develops a line of BESS products to support transportable vehicle charging and grid support at temporary power locations.

The ideal candidate will possess strong experience in heavy-duty vehicle systems and BESS functionality, including grid charging, grid-forming and grid-following applications, export power, AC grid interaction, hybrid energy architectures, and compliance with industry standards such as UL1973, UL9540/UL9540A, and UL508.

Are you ready to electrify the transportation industry? We’re looking for a passionate and innovative Electrical Design Engineer to help shape the future of electrified commercial vehicles. This is more than a job—it’s your chance to collaborate with forward-thinking customers and help bring cutting‑edge electrical components to life.

As a key member of our Electrification Engineering Team, you’ll lead the design and validation of high‑voltage electrical components—from battery energy storage systems to HV junction boxes, controllers, inverters, heaters, harnesses, and more. You’ll work hand‑in‑hand with customers, suppliers, and internal experts to accelerate the development and application of advanced electrification solutions.

• Design, develop, and validate medium‑voltage (12–2000V) electrical subsystems for use in EV power platforms and stationary energy solutions.
• Specify and integrate components including inverters, converters, power distribution units, transformers, AC‑DC and DC‑DC power modules, charging systems, lithium and sodium batteries, power distribution panels, and harnesses/connectors.
• Ensure all designs comply with relevant industry standards and certifications, including UL1973, UL508, UL9540A, and applicable grid codes.
• Conduct electrical system‑level calculations including load flow, short‑circuit analysis, fault protection, thermal analysis,…