Senior Propulsion Engineer I

CesiumAstro•El Segundo, CA

1d•$140,000 - $168,000

About The Position

At CesiumAstro, we are developers and pioneers of out-of-the-box communication systems for satellites, UAVs, launch vehicles, and other space and airborne platforms. We take pride in our dynamic and cross-functional work environment, which allows us to learn, develop, and engage across our organization. If you are looking for hands-on, interactive, and autonomous work, CesiumAstro is the place for you. We are actively seeking passionate, collaborative, energetic, and forward-thinking individuals to join our team. We are seeking a Senior Propulsion Engineer I to lead the design, development, analysis, and testing of critical liquid rocket engine hardware and propulsion subsystems. This role offers the opportunity to take ownership of complex flight hardware from concept development through qualification and flight readiness.

Requirements

Bachelorâ€™s degree in Mechanical Engineering, Aerospace Engineering, or a related field.
4+ years of experience with mechanical design, development, fabrication, assembly, or test.
Hands-on proficiency in CAD tools (Siemens NX, SolidWorks).
Demonstrated expertise in structural or mechanical design for flight hardware.
Experience in early-stage vehicle architecture and design trades.
Strong analytical and problem-solving skills with high attention to detail.
Willing to make mistakes, take responsibilities, work independently and be transparent about your work.
Excellent written and verbal communication skills.

Nice To Haves

Prior experience designing a variety of liquid rocket engine parts, including loading frames, gimbals, bellows units, and pipelines.
Practical experience in test bench setup and performance diagnostics.
Hands-on engineering (Full-stack: computer to wrench to broom).
Geometric dimensioning and tolerancing (GD&T).
Familiarity with aerospace safety and reliability practices.
Experience in a start-up or rapid development environment.
Experience with tools such as ANSYS and MATLAB

Responsibilities

Design and develop a variety of liquid rocket engine parts, including loading frames, gimbals, bellows units, and pipelines. Perform calculations and analyses with team support.
Own requirements definition, architecture trades, and system-level integration for assigned subsystems.
Generate technical documentation, including reports, specifications, and contributions to PDRs and CDRs.
Perform CFD and FEA analyses to evaluate performance parameters such as pressure drops and hydraulic characteristics and mechanical integrity under operating conditions.
Develop and execute test programs, analyze experimental data, and apply findings to optimize designs.
Collaborate across mechanical, aerospace, and controls engineering teams to deliver flight-ready hardware.