Senior Thermal Systems Design Engineer

About the role

Astro Mechanica is a vertically integrated aerospace company building a faster, more connected future. Our mission is to democratize high-speed flight by making supersonic travel flexible, accessible, and sustainable. We believe that rapid, on-demand, point-to-point global mobility will become the new standard for moving people and goods across the planet. To achieve this, we are integrating our advanced airframe and engine technologies-which include Duality™, our proprietary dual-use propulsion system-with a new flight operations model to make supersonic transport as efficient and economical as commercial air travel is today. In the near term, we are developing adaptable, high-speed systems to close aircraft performance gaps for the United States government. We're a team of passionate engineers dedicated to advancing aerospace. We're generalists with specialist depth, united by a flat structure and a shared obsession with building things that work well. We move fast, stay pragmatic, and let engineering excellence speak louder than hierarchy.

Responsibilities

• Generate CAD models, detailed engineering drawings, and apply appropriate GD&T
• Architect thermal systems and develop 1-D fluid network models to predict system behavior, transient responses, and sensitivities
• Architect and complete detailed thermal system design and size fluid system components such as pumps, heat exchangers, valves, and regulators
• Use hand calculations and computational tools (CFD) to optimize component and system effectiveness
• Analyze heat loads, conduction paths, and interface temperatures, and define instrumentation to anchor models with test data
• Own and present design reviews to the team
• Assemble prototypes, establish test procedures, and analyze data to verify requirements and performance metrics
• Diagnose thermal system problems efficiently and determine corrective actions

Requirements

• 5+ years hands-on experience in propulsion or similarly complex thermal environments
• Proficient in CAD modeling (Siemens NX), drawing generation, and GD&T
• Strong understanding of thermodynamics, heat transfer, and fluid behavior
• Experience designing and analyzing thermal systems using CFD and 1D network modeling tools
• Informed on instrumentation types and limitations, and ability to anchor models with test data
• Takes initiative for continuous improvement (not just completing assigned tasks)
• Flexibility to work in fast-paced environment
• Attentive to detail and maintain a high level of quality in all work

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