Propulsion Engineer II — Flight Hardware & Tests

CesiumAstro; El Segundo (CA); On-site; USD 118,000 - 142,000; Full time

Benefits offered by this job

company stock options

health

dental

vision

HSA

FSA

life

disability

retirement plans

Job summary

CesiumAstro is seeking a Propulsion Engineer to lead design, development, analysis, and testing of liquid rocket engine hardware and propulsion subsystems. You will own key subsystems from concept through qualification and flight readiness.

The role requires a Mechanical or Aerospace Engineering background, 2+ years of hands-on design/test experience, and strong CAD/analytical skills. Collaborative, autonomous work in a fast-paced environment is expected.

Qualifications

• Bachelor’s degree in Mechanical Engineering, Aerospace Engineering, or a related field.
• 2+ years of experience with mechanical design, development, fabrication, assembly, or test.
• Hands-on proficiency in CAD tools (Siemens NX, SolidWorks).
• Strong analytical and problem-solving skills with high attention to detail.
• Willing to take responsibility, work independently and be transparent about your work.
• Excellent written and verbal communication skills.

Responsibilities

• Design and develop a variety of liquid rocket engine parts, including loading frames, gimbals, bellows units, and pipelines.
• 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 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.

Skills

CAD tools

Siemens NX

SolidWorks

Flight hardware design

Analytical skills

Independent work

Education

Bachelor’s degree in Mechanical Engineering

Bachelor’s degree in Aerospace Engineering

Tools

ANSYS

MATLAB

Job description

CesiumAstro is seeking a Propulsion Engineer to lead design, development, analysis, and testing of liquid rocket engine hardware and propulsion subsystems. You will own key subsystems from concept through qualification and flight readiness.

The role requires a Mechanical or Aerospace Engineering background, 2+ years of hands-on design/test experience, and strong CAD/analytical skills. Collaborative, autonomous work in a fast-paced environment is expected.