Mission Design Engineer

requirements into prototype systems. Support system-level integration and ensure alignment between modeled performance and actual system behavior. Participate in flight tests and live-fire events, including pre-test analysis, real-time support, and post-test evaluation. Use test results to refine both system design and simulation models. Cross-Functional Collaboration Work across engineering disciplines (GNC, propulsion, avionics, software, manufacturing). Communicate mission-level insights to inform design tradeoffs and prioritization. Support design reviews, technical briefings, and customer engagements. Basic

Qualifications: Bachelor's degree in aerospace engineering, mechanical engineering, electrical engineering, physics, or related field. 2+ years of experience in mission analysis, operational analysis, systems engineering, or aerospace/defense modeling & simulation . Experience with AFSIM, EADSIM, or similar tools (e.g., STK, MATLAB/Simulink, custom simulation frameworks). Experience translating mission needs into engineering

requirements and design trades. Familiarity with aerospace or defense systems (missiles, aircraft, spacecraft, or launch vehicles). Strong analytical and communication skills. Ability to obtain and maintain a Top Secret/SCI clearance . Additional

Requirements: Ability to put in extended hours, including evenings and weekends, when required to meet aggressive timelines This role is based in Torrance, CA and requires full-time onsite presence Other Duties Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or

responsibilities that are required of the employee for this job. Duties,

responsibilities and activities may change at any time with or without notice.

Benefits And

Perks All full-time employees are granted meaningful long-term equity, sharing in the company's significant growth trajectory. We offer four (4) weeks of paid time off, ten (10) company-paid holidays, and comprehensive health

benefits - including 100% employee-covered medical and strong dependent coverage, along with dental and vision plans. We also provide paid parental leave to support growing families, a $100 monthly fitness stipend to promote health and performance, and onsite EV charging for convenience. In addition, employees enjoy

perks like catered meals, company-covered food during high-demand periods, and a fully stocked kitchen to stay fueled throughout the day. While this position does not currently require a U.S government-issued security clearance, it may in the near future. Therefore, the ability to obtain and maintain a U.S. government– issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance. Affirmative Action/EEO Statement Employment with Castelion is governed on the basis of competence and

qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.

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