Electrical Design Engineer (Contract)

Combined Selection Group Ltd; California (MO); On-site; USD 130,000 - 170,000; Full time

Job summary

Combined Selection Group Ltd is seeking an Electrical Design Engineer for a 12-month contract onsite in California to design HV power systems for aerospace applications. You will lead the electrical design of battery modules, high-power charging, and safety-critical interfaces, while performing analyses and supporting certification.

The role requires strong HV knowledge, BMS experience and collaboration with mechanical, software and systems teams to deliver robust power architectures for

Qualifications

• 8+ years of professional electrical design experience.
• Strong experience with high-voltage systems above 400V.
• Experience with BMS hardware and lithium-ion battery systems.
• Proficiency with electrical analysis tools and ECAD platforms.
• Knowledge of EMI/EMC, grounding and shielding.

Responsibilities

• Architect 400V+ HV power distribution and battery interfaces.
• Lead electrical design of Li-ion battery modules and packs.
• Support high-power charging architectures and onboard/offboard systems.
• Perform power budgets, fault-current modelling and simulations.
• Develop grounding, shielding and EMI/EMC strategies for aerospace safety.
• Collaborate with mechanical, software, systems and manufacturing teams.

Skills

8+ years electrical design experience

High-power distribution design

BMS hardware experience

Battery systems knowledge

EMI/EMC and grounding

Cross-disciplinary collaboration

Electrical analysis simulations

Communication across teams

Education

B.S./M.S./Ph.D. in Electrical Engineering or related

Tools

LTspice

PSpice

MATLAB/Simulink

Altium

Mentor Graphics

Zuken

NX

SolidWorks

Job description

Electrical Design Engineer (Contract) Location: California Contract: 12 Months, with potential to extend | Full-Time Working Arrangement: Onsite Travel: Occasional / Regular

What You'll Be Doing

• Architecting 400V+ high-voltage power distribution systems, including busbars, wiring harnesses, contactors, fuses and power electronics interfaces.
• Leading the electrical design of lithium-ion battery modules and packs, including voltage and temperature sensing, cell balancing and high-current interconnects.
• Supporting the development of high-power charging systems, including on-board and off-board charging architectures.
• Performing electrical analysis including power budgets, voltage drop, fault-current modelling and transient/steady-state simulation.
• Developing grounding, shielding and EMI/EMC strategies for safety-critical aerospace systems.
• Designing HV protection systems including HVIL, isolation monitoring and circuit protection.
• Supporting component selection across MOSFETs, IGBTs, contactors and high-power PCB designs.
• Leading electrical verification activities including high-current characterization, insulation-resistance testing and HiPot testing.
• Conducting FMEA and failure analysis to identify and mitigate electrical safety risks.
• Working closely with mechanical, software, systems and manufacturing engineering teams.
• Producing technical specifications, engineering reports and design documentation to support development and certification.

What We're Looking For

• B.S., M.S. or Ph.D. in Electrical Engineering or a related discipline.
• 8+ years of professional electrical design experience.
• Strong experience with high-voltage systems above 400V, ideally within aerospace, EVs, electric propulsion, automotive or heavy transportation.
• Deep understanding of high-power distribution, busbar design, creepage/clearance and electrical protection.
• Experience designing or integrating Battery Management System (BMS) hardware.
• Knowledge of lithium-ion battery systems, including voltage/current sensing, isolation, SoC and cell-balancing architectures.
• Proficiency with LTspice, PSpice, MATLAB/Simulink or similar electrical analysis tools.
• Experience with ECAD platforms such as Altium, Mentor Graphics or Zuken.
• Familiarity with NX and/or SolidWorks for electrical/mechanical integration.
• Strong knowledge of EMI/EMC, grounding and shielding.
• Ability to communicate complex electrical designs clearly across multidisciplinary engineering teams.

Desirable Experience

• eVTOL or electric aircraft
• aerospace battery systems
• EV propulsion
• high-power charging
• CCS/MCS/NACS
• DO-160G
• DO-311A
• ARP4754
• ARP4761
• aerospace certification
• high-power PCB design

Why Consider This Opportunity?

This is a chance to work at the intersection of aerospace, electrification and high-voltage battery technology, contributing directly to the development of a new generation of electric aircraft. You'll be joining a highly technical engineering environment where your work will have a direct impact on aircraft power architecture, battery safety, performance and flight readiness.