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Principal Engineer, Fluid & Thermal Systems (R5620)

Shield AISeattle, WashingtonX-BAT Engineering - Mechanical
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Salary
$266K - $400K USD
Job type
Full Time Employee
Posted
11 Sept 2026
Status
Open · checked 7d ago

About this role

Defense is currently hiring a full-time Principal Engineer, Fluid & Thermal Systems (R5620) to work in Seattle, Washington. This position is ideal for an experienced engineer looking to shape the future of autonomous systems and robotics.

Role Overview

The Principal Engineer for Fluid and Thermal Systems will spearhead the design, development, and optimization of thermal and fluid solutions for advanced autonomous ground systems and unmanned aerial vehicles. This role focuses on guiding cutting-edge products through prototyping, testing, and ultimate production while ensuring reliable performance in demanding operational environments. The position demands deep technical leadership and active cooperation across multiple departments.

Key Responsibilities

Lead the complete lifecycle design, development, and optimization of fluid and thermal systems for autonomous UAVs and ground equipment.
Drive innovation through hands-on prototyping, rigorous testing, and seamless integration of thermal solutions.
Provide strong technical leadership and work alongside diverse, cross-functional engineering teams.
Ensure all developed systems operate reliably within challenging operational conditions from the conceptual phase through full-scale production.

Skills and Tools

Fluid system design
Thermal system design
Prototyping and testing
Technical leadership
Cross-functional collaboration

Salary and Benefits

Compensation ranges from $266,000 to $400,000 USD per year.

About the Company

Defense is a venture-backed defense-tech enterprise dedicated to safeguarding service members and civilians utilizing intelligent systems. The organization develops innovative products including Hivemind autonomy software, V-BAT and X-BAT aircraft, alongside Aechelon simulation and synthetic reality tools. Operating across facilities in the United States, Europe, the Middle East, and the Asia-Pacific region, the technology provides active support for missions globally.

How to Apply

Interested candidates should visit the official company careers page to submit an application for this position.

Questions candidates ask

What is the job title for this position?

The job title is Principal Engineer, Fluid & Thermal Systems (R5620).

Where is the job located?

The position is located in Seattle, Washington.

What is the salary range for this role?

The salary ranges from $266,000 to $400,000 USD per year.

Is this a remote position?

No, this is a full-time employee role based out of the Seattle location.

How can I apply for this job?

You can apply by visiting the official company careers page.

Ready to apply?

The application is on the official Shield AI careers page.

Apply on company site