Lead Mechanical Engineer - Heat Exchangers (Austin, TX)

• Own and develop the heat exchange system for Exowatt’s power conversion unit from design and analysis in a hands-on fashion. Engage with suppliers for development, build and testing. • Perform analysis of mechanical components and systems for heat exchangers utilizing CFD and FEA such as Ansys multiphysics, CAD (Solidworks, Creo, or equivalent. • Design, build and test of prototype heat exchanger units for Exowatt’s power conversion units. • Validate models by test and analytical methods • Create detailed engineering drawings and specifications for manufacturing • Collaborate with cross-functional teams, including electrical, controls, thermal, and software engineers • Evaluate and select appropriate materials based on requirements, cost, and sustainability • Design for manufacturability, assembly, and serviceability • Interface with suppliers, manufacturers, and external engineering partners • Participate in design reviews and ensure compliance with industry standards and regulations • Troubleshoot issues during testing and deployment

• Bachelor's degree in Mechanical Engineering or related field; Master's degree preferred • 7+ years of mechanical engineering experience with a focus on thermal-fluid systems with a focus on heat exchanger design, analysis, and development. • Demonstrated experience designing, analyzing, and optimizing heat exchangers (shell-and-tube, fined heat exchangers, heat sinks, printed circuit heat exchangers, heat pipes, etc) for high temperature applications. • Hands-on experience in testing of heat exchangers, energy, and power conversion systems. • Strong foundation in thermodynamics, conjugate heat transfer, fluid mechanics, and thermal coatings, with the ability to perform thermal and hydraulic sizing calculations • Proficiency in 3D CAD software (SolidWorks, Creo, or similar) and experience designing complex flow paths and pressure-containing components • Experience with FEA and CFD software (ANSYS multiphysics, Nastran, or similar) for thermal stress analysis and fatigue life prediction under cyclic operating conditions • Familiarity with CFD tools for flow distribution, heat transfer optimization, and pressure drop analysis • Strong understanding of GD&T ASME Y14.5 and engineering drawing standards for precision-manufactured components • Knowledge of relevant standards and codes (ASME BPVC, TEMA, API, ISO) as applied to pressure vessels, heat exchangers, and rotating equipment • Experience designing for demanding operating environments, including thermal cycling, high-temperature creep, and corrosive or reactive working fluids • Experience with renewable energy systems, thermal energy storage, or concentrated solar power preferred • Excellent communication and collaboration skills with the ability to work across multidisciplinary teams