Senior Propellant Analyst — Solid Rocket Motor Design

Castelion; Torrance (CA); On-site; USD 140,000 - 190,000; Full time

Benefits offered by this job

Generous benefits package

Job summary

Castelion is seeking a Senior Propellant Analyst to lead design, development, and qualification of solid rocket motors for hypersonic defense systems. You will influence grain geometry, propellant formulation, and case design in a fast-growing startup, with ownership and direct impact on flight-ready hardware.

Join a team that collaborates closely with manufacturing and test groups, supports aging studies and thermal cycling, and drives propulsion innovations from concept to flight readiness.

Qualifications

• Bachelor's degree in Aerospace, Mechanical, Chemical Eng or related field.
• 5+ years of propellant grain analysis or solid rocket motor design experience.
• Strong understanding of propellant grain structural mechanics.
• Experience with finite element analysis tools (Abaqus, NASTRAN, ANSYS) for propellant grain stress analysis.

Responsibilities

• Conduct structural and stress analysis of propellant grains under mechanical, thermal, and pressure loading.
• Use analytical methods, FEA, and propulsion software to evaluate grain geometry and performance.
• Collaborate with motor design engineers to influence grain geometry and propellant formulation early in development.
• Support propellant grain qualification activities, including aging studies and thermal cycling.
• Exemplify technical excellence and accountability for your work.
• Communicate technical content effectively to partner teams.

Skills

Propellant analysis

FEM tools experience

Propellant grain design

Structural mechanics knowledge

Education

Bachelor's degree in Aerospace/Mechanical/Chemical Eng

Master's degree or PhD (preferred)

Tools

Abaqus

NASTRAN

ANSYS

Job description

Castelion is seeking a Senior Propellant Analyst to lead design, development, and qualification of solid rocket motors for hypersonic defense systems. You will influence grain geometry, propellant formulation, and case design in a fast-growing startup, with ownership and direct impact on flight-ready hardware.

Join a team that collaborates closely with manufacturing and test groups, supports aging studies and thermal cycling, and drives propulsion innovations from concept to flight readiness.