Mechanical Engineer - Thermal Design
Preferred Location : Onsite - Ottawa
Reports to : Head of Hardware
The Role
Our systems are built for continuous operation in harsh, remote, and mission-critical environments where reliability is non-negotiable. The difference between a lab prototype and a fielded capability is often heat. Sealed, rugged electronics must reject the power they dissipate across extreme temperature swings, often with limited or no forced airflow, for the life of the mission.
This role converts system requirements into thermal architectures and hardware that keep sensitive electronics within their limits and can be produced at scale and serviced in the field. You'll drive the thermal design, analysis, and validation of mission-critical electronics, from early concept and simulation through prototyping, test, and ramp to production with suppliers.
What You’ll Do
Design and develop thermal management solutions, including heat sinks, heat
spreaders, thermal interface materials, and conduction paths, for sealed, rugged
electronics operating continuously in harsh, remote environments.
Perform thermal analysis, simulation (e.g., CFD), and hand calculations to predict
component temperatures, identify hot spots, and ensure reliable performance
across extreme hot and cold conditions.




Collaborate with electrical and systems engineers on power dissipation budgets,
component placement, and material selection to optimize thermal performance at
the system level.
Plan and execute thermal testing and validation, correlate models to test data, and
drive design revisions based on test and field feedback.
Develop CAD models (in Solid Works) of thermal hardware, along with engineering
calculations and design documentation that comply with engineering standards.
Work closely with mechanical, manufacturing, and supply chain teams to ensure
thermal solutions meet cost, weight, size, and production constraints, applying
DFM and DFA principles.
Contribute to continuous improvement of thermal design standards, test
procedures, and product documentation.
What You’ll Bring
Bachelor's or Master's degree in Mechanical Engineering, Mechatronics, or a related
field.
4–7 years of experience in thermal design and analysis for electronic systems,
ideally rugged, sealed, or harsh-environment hardware.
Proficiency in Solid Works.
Experience with thermal simulation and CFD tools (ANSYS Icepak or Fluent,
Simcenter Flo THERM, Solid Works Flow Simulation, or similar).
Robust understanding of heat

📌 Mechanical engineer (Quebec City)
🏢 Dominion Dynamics
📍 Quebec City