Senior Electromechanical Engineer, Power Electronics Packaging

Mainspringenergy; Edison (CA); On-site; USD 150,000 - 210,000; Full time

Job summary

Mainspring Energy is seeking a Senior Staff Mechanical Engineer — Electromechanical to lead design and integration of electrical enclosures, busbars, and cable systems for next-generation energy platforms.

You will tackle challenging packaging, durability, manufacturability, and system integration across harsh environments and future megawatt-scale applications. Real-world thermal and EMI constraints will guide robust solutions.

Qualifications

• BS or MS in Mechanical Engineering or related field.
• 12+ years of experience designing electromechanical hardware systems.
• Proven experience designing electrical or electronic enclosures through production release.
• Strong background in sheet metal design and mechanical-electrical integration.
• Experience packaging electrical components such as fuses, contactors, relays, PCBAs, busbars, cables, connectors.

Responsibilities

• Lead the design and development of electrical enclosures, busbars, cable assemblies, and integrated electromechanical systems.
• Drive packaging decisions balancing thermal performance, vibration durability, EMI, creepage/clearance, manufacturability, serviceability, and cost.
• Own hardware through the full product lifecycle including concept development, prototyping, validation, production launch, and sustaining engineering.
• Partner with Electrical, Reliability, Manufacturing, Test, NPI, and supplier teams to develop robust hardware solutions.
• Solve environmental durability problems involving corrosion, outdoor deployment, thermal extremes, and vibration-heavy conditions.
• Lead root-cause investigations for field and test failures and drive corrective actions into production.
• Mentor engineers through design reviews and technical leadership on complex problems.

Skills

Electromechanical design

Hardware integration

Power electronics packaging

Sheet metal design

Thermal management

EMI packaging

SolidWorks

Education

BS in Mechanical Engineering

MS in Mechanical Engineering

Tools

PLM systems

Ansys

Job description

Mainspring Energy is seeking a Senior Staff Mechanical Engineer — Electromechanical to lead design and integration of electrical enclosures, busbars, and cable systems for next-generation energy platforms.

You will tackle challenging packaging, durability, manufacturability, and system integration across harsh environments and future megawatt-scale applications. Real-world thermal and EMI constraints will guide robust solutions.