Thermal-Fluids Analysis Engineer

The future of aerospace and defense starts here.

Ursa Major was founded to revolutionize how America and its allies access and apply high-performance propulsion, from hypersonics to solid rocket motors, satellite maneuvering and launch. We design and deliver propulsion and defense systems that solve the most urgent and critical national security demands.

As a Staff Thermal-Fluids Analysis Engineer you will support all our product design programs through a broad variety of fluid analysis techniques. Our ideal candidate is one proficient in both CFD as well as steady-state and transient 1D (lumped parameter) fluid modeling. You will be exposed to all systems on our engines and the unique challenges each component presents. You will also be expected to leverage existing knowledge to solve difficult problems throughout an engine lifecycle.

You will be expected to assess the risk and performance of the hardware and to provide proactive feedback to our design team regarding how to improve their components based on the results of your work. We are seeking an individual who is excited about solving problems on the edge of technical capabilities by using their deep understanding of fluids, thermodynamics, combustion, and simulation.

This individual will be able to apply that understanding to predict the performance of rocket engine components including combustors, manifolds, and turbo machinery.

We are looking for experienced analysts who will be responsible for the technical growth of Ursa Major’s fluid analysis capabilities. You will report to our Propulsion Analysis Team Lead.

• Use hand calculations and steady CFD to predict fluid behavior throughout the engine system and its components (e.g. assess pressure drops and mass flow distributions).
• Build steady-state and transient 1D models of our engines’ fluid systems to predict matters such as engine components’ operating states and engine startup behavior.
• Identify potential design improvements and collaborate with other engineering teams to develop our engines while ensuring they meet our system-level requirements.
• Work closely with our test team to request instrumentation necessary to anchor our analytical models.
• Support anomaly investigations by building transient 1D fluid models to recreate measurements recorded during engine operation.
• Ownership of fluid models of rocket engines and related systems. This will include support of concept and clean-sheet designs, as well as supporting mature system improvements.
• Improve upon Ursa’s analytical methods and seek out new approaches and tools.
• Provide professional development, mentorship, and technical guidance to peers.

• B.S. degree in Mechanical, Aerospace Engineering, or a comparable field.
• 5+ years of combined fluids analysis experience (CFD and 1D, as detailed below).
• Experience in Computational Fluid Dynamics (CFD) using commercial codes (ANSYS Fluent or CFX preferred, but knowledge of StarCCM+ or similar tools is welcome).
• Experience developing steady and transient 1D models of fluid system analyses ideally using ROCETS or GFSSP. Knowledge of SINDA/FLUINT, FloCAD, AFT Arrow/Fathom/Impulse, Flownex, Flowmaster, GT-SUITE, or comparable lumped parameter analysis tools would also be gladly accepted.
• Demonstrated experience in fluid mechanics, thermodynamics, and heat transfer.
• Programming experience (Python ideal, but MATLAB or other high-level languages acceptable).
• Basic experience with 3D CAD software (Creo and NX are ideal).
• Experience with complex fluid-mechanical systems - our engines are the product of integrated combustors, turbo machinery, and control systems, all of which must be well understood and optimized.
• Excellent communication skills, both written and verbal.
• Comfor…