Mechanical / Thermal Engineer

EV.Careers; Seattle (WA); On-site; USD 110,000 - 170,000; Full time

Benefits offered by this job

Competitive salary

Relocation assistance

Fully paid healthcare

Strong 401(k) match

Job summary

EPG is seeking a Mechanical / Thermal Engineer to own the mechanical packaging and thermal design for a high-voltage battery and power electronics system intended for datacenter rack integration. The engineer will ensure the assembly fits within rack constraints while maintaining reliable cooling for continuous operation.

The role requires at least 5 years in thermal management and mechanical packaging of power electronics or battery systems, with both air- and liquid-cooled experience and a

Qualifications

• BS in Mechanical Engineering.
• 5+ years of thermal management and mechanical packaging of power electronics or battery systems.
• Air- and liquid-cooling design experience.
• High-power-density enclosure design plus thermal simulation.
• This role is onsite in the Pacific Northwest and requires US work status (no sponsorship).

Responsibilities

• Design the battery-pack and power-converter enclosure for datacenter rack integration.
• Own the thermal strategy, air- and liquid-cooled, for continuous duty.
• Handle rack space, weight, access packaging, and serviceability.
• Integrate rack airflow and cooling; own the thermal interface with the battery team.
• Own ingress protection and high-power-density enclosure design.

Education

BS in Mechanical Engineering

Job description

Seattle, United States | Posted on 09/16/2026

EPG is currently seeking a Mechanical / Thermal Engineer for one of our partners that is an established high-voltage battery and power-electronics company, bringing technology proven in demanding, high-reliability applications to a new backup-power product for AI data centers. In this position, you will own the mechanical packaging and thermal design that gets a high-voltage battery and power converter into a datacenter rack and keeps it cool under continuous duty.

Responsibilities

• Design the battery-pack and power-converter enclosure for datacenter rack integration.
• Own the thermal strategy, air- and liquid-cooled, for continuous duty.
• Handle rack space, weight, access packaging, and serviceability.
• Integrate rack airflow and cooling; own the thermal interface with the battery team.
• Own ingress protection and high-power-density enclosure design.

Requirements

• BS in Mechanical Engineering.
• 5+ years of thermal management and mechanical packaging of power electronics or battery systems.
• Both air- and liquid-cooling design experience.
• High-power-density enclosure design plus thermal simulation.
• This role is onsite in the Pacific Northwest. Must be able to work in the United States without sponsorship (US Persons only, export-control requirement).

Preferred Qualifications

• Packaging automotive or aerospace battery/power systems into stationary or industrial products.
• Datacenter rack standards (EIA-310, OCP) and liquid-cooling infrastructure.
• Competitive salary, relocation assistance, fully paid healthcare, and a strong 401(k) match.
• Own the full mechanical and thermal design of a clean-sheet 800V product.
• Build on technology already proven in demanding, high-reliability applications.