Senior Thermal Engineer, Expeditionary AI HPC Data Centers

The Thermal Engineering teams work is essential to support our rapid innovation cycle and maintain the performance and reliability of advanced defense technologies. Thermal Engineers own the full development life cycle from conceptual design through prototyping lab and field testing and operational deployment ensuring high-performance resilient systems that meet the demands of complex contested environments.

We are looking for a Senior Thermal Engineer in Costa Mesa CA to own the thermal management of expeditionary AI/HPC data centersair-transportable modular compute and command-and-control infrastructure built to run at forward operating locations. You will apply a deep understanding of heat transfer fluid dynamics and HVAC to keep high-density compute running reliably in austere environments with extreme temperatures and limited power.

What Youll Do

• Own the thermal design and analysis of deployable data center cooling systemsair-side and water-side cooling heat rejection chilled water plant and liquid coolingfrom rack and chip level up through the full facility.
• Use first principles to discern the right level of analysis running hand calcs spreadsheets and MATLAB/Python first-order models before detailed design.
• Define cooling architecture and heat-rejection strategyCRAH/CRAC air-side economization chilled water plants dry coolers CDUs rear-door heat exchangers and direct-to-chip and immersion liquid coolingto keep equipment within limits as power density scales.
• Develop cooling approaches for high-density racks and trade off air liquid and hybrid cooling for modular transportable systems in austere high-ambient environments.
• Work with electrical mechanical and facilities engineers to characterize IT and equipment heat loads across operating and failure modes.
• Weigh cooling architectures against reliability efficiency (PUE/WUE) and total cost driving trade studies that balance thermal margin with capital and operating cost.
• Own the thermal FEA/CFD and system models predict facility performance and set red/yellow limits for commissioning and operation.
• Lead prototype builds field testing commissioning and operational validation of cooling designs (CAD sensor and DAQ selection data post-processing results).
• Present thermal status at internal and customer reviews with a clear view of timelines and technical status.
• Develop internal tools to improve analysis effectiveness and efficiency.
• Support failure reviews and root-cause analysis with test data and thermal analysis.

Required Qualifications

• MS or higher in mechanical engineering applied physics or related field focused on heat transfer fluid dynamics and HVAC
• In-depth understanding of heat transfer and fluid dynamics
• 5 years designing thermal management systems for data centers or comparable mission-critical infrastructure
• Full-spectrum data center thermal experienceair-side and water-side cooling heat rejection chilled water plant design power density management and liquid cooling
• Steady-state and transient system modeling of thermal management systems including HVAC and refrigerant simulations
• Validating and testing data center thermal equipment with knowledge of applicable operating standards
• Track record of staying abreast of the latest data center thermal management technologies
• CAD experience with Siemens NX or SolidWorks

Preferred Qualifications

• Coding in Python or MATLAB for applications such as lumped-capacitance steady-state and transient analysis
• Thermal FEA/CFD experienceSTAR-CCM ANSYS Icepak or FloEFD.
• Familiarity with efficiency metrics (PUE/WUE) and thermal design for high-density AI/HPC compute
• Experience with modular transportable or ruggedized data centers and operation in austere high-ambient environments
• Be able to obtain and hold a U.S. Secret security clearance

The salary range for this role is an estimate based on a wide range of compensation factors inclusive of base salary only. Actual salary offer may vary based on (but not limited to) work experience education and/or training critical skills and/or business considerations. Highly competitive equity grants are included in the majority of full time offers; and are considered part of Andurils total compensation package. Additionally Anduril offers top-tier benefits for full-time employees including:

At Anduril we invest in our people. Our comprehensive competitive benefits package (available at little to no cost to employees) ensures youre supported in health recovery and whatever comes next.For more information Explore Our Benefits.

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