RESPONSIBILITIES
Own engine balance and cycle modeling: Develop and maintain integrated 1D engine/thruster cycle models in ROCETS, Sinda/Fluint, or equivalent tools to predict system-level performance, identify design sensitivities, and support architecture trade studies from concept through flight.
Lead injector analysis and sizing: Apply first-principles and empirical methods to size injector elements, predict atomization and mixing efficiency, and validate designs against performance targets. Translate model outputs into actionable design guidance for hardware engineers.
Assess and mitigate combustion instability: Perform stability assessments using analytical and numerical methods — including acoustic mode analysis, Rayleigh criterion evaluation, and sensitivity studies — and recommend design mitigations such as acoustic cavities, baffle configurations, and injector pattern modifications.
Apply CFD to combustion dynamics: Leverage CFD tools (Ansys Fluent, Reacting Flow, or equivalent) to characterize combustion dynamics, flame structure, mixing efficiency, and hot-gas-side heat flux distributions, feeding results back into design and stability assessments.
Develop thrust chamber thermal-fluid models: Build conjugate heat transfer and regenerative cooling models to predict wall temperatures, heat flux profiles, and coolant pressure drop, ensuring hardware margin across the operating envelope.
Partner with designers and suppliers: Work directly with thruster designers and suppliers to interpret test data, validate models against hot-fire results, and close the loop between analysis and hardware performance.
Build lightweight design tools: Create accessible tools and parametric models that allow hardware responsible engineers to quickly size components and evaluate performance without requiring deep analysis expertise.
Define and execute evolutionary analysis plans: Structure the analysis program to mature in lock-step with hardware development and testing — increasing fidelity as data becomes available and design decisions demand it.
Establish analytical best practices: Define processes for in-depth analysis, second-set-of-eyes reviews, and parameter input standards. Build a culture of analytical rigor across the propulsion team.
Mentor and cross-train: Build analytical capability within the broader propulsion team, including cross-training hardware responsible engineers on core analysis methods and tools.
QUALIFICATIONS
Bachelor's degree in Mechanical or Aerospace Engineering.
12+ years of professional experience in liquid rocket engine or thruster analysis.
Engine balance and cycle modeling: Demonstrated hands-on experience building and running integrated 1D engine cycle models in ROCETS, Sinda/Fluint, GFSSP, or directly comparable tools.
Injector design and sizing: Significant experience sizing injector elements (e.g., impinging, coaxial, swirl) using analytical methods and CFD, with demonstrated ability to predict and improve mixing efficiency and atomization.
Combustion instability assessment and mitigation: Proven experience identifying instability risk in thruster designs, performing acoustic and stability analyses, and recommending or validating mitigation strategies through analysis and/or testing.
Experience with 2-phase fluid modeling in propulsion systems.
Experience with conjugate heat transfer and regenerative cooling analysis.
Familiarity with the full thruster development process, from concept trade studies through hardware qualification.
Excellent written and verbal communication skills, including the ability to present complex analysis clearly to non-specialist stakeholders.
U.S. Citizen, eligible for DoD Secret or TS/SCI clearance.
PREFERRED SKILLS AND EXPERIENCE
Master's or PhD in Mechanical or Aerospace Engineering with an analysis focus (advanced degrees count toward years of experience).
Proficiency across multiple propulsion analysis tools: ROCETS, Sinda/Fluint, Thermal Desktop, GFSSP, Ansys Fluent, Flow-3D, or equivalent.
Combustion CFD: Experience applying CFD (Ansys Fluent, Reacting Flows, or equivalent) to combustion dynamics, including reacting flow simulations and heat flux prediction.
Programming skills (Python, MATLAB, or similar) to automate analysis workflows, process test data, and build parametric design tools.
Direct experience supporting thruster development test campaigns, including pre-test predictions and post-test model validation.
Track record of innovative problem-solving in coupled thermo-fluid-structural problems.
Experience in a startup or similarly resource-constrained, high-tempo environment.
Familiarity with the full vehicle lifecycle from concept through production.
COMPENSATION
Base Salary: $185,000 to $280,000
Equity + Benefits including Health, Dental, Vision, HRA/HSA options, PTO and paid holidays, 401K, Parental Leave
Your actual level and base salary will be determined on a case-by-case basis and may vary based on the following considerations: job-related knowledge and skills, education, location, and experience.
ADDITIONAL REQUIREMENTS
Work Location—Successful candidates will be located near Denver or Colorado Springs. While we observe a hybrid work environment, some work must be done on site.
Remote-For exceptionally qualified candidates who live outside a reasonable commuting distance of our Centennial or Long Beach offices, remote work within the U.S. may be considered on a case-by-case basis, subject to business needs and approval. Remote eligibility is not guaranteed and will be confirmed at the offer stage. Remote employees are expected to travel to a primary office about once a month. Any remote work must be performed from an approved location within the U.S. meeting the Company's security requirements
Work environment—the work environment; temperature, noise level, inside or outside, or other factors that will affect the person's working conditions while performing the job.
Physical demands—the physical demands of the job, including bending, sitting, lifting and driving.
This position will be open until it is successfully filled. To submit your application, please follow the directions below.
#LI-Onsite
To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State.
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