Aerospace Mechanical Engineering Intern — Missile Systems

Castelion; Torrance (CA); On-site; USD 28,000 - 41,000; Full time

Job summary

Castelion is seeking a Winter/Spring 2027 Mechanical Engineering Internship Co-Op in Torrance, CA. You will design, analyze, and test components for missile subsystems, including propulsion and power electronics, while supporting simulations, prototyping, and system integration in a fast-paced startup environment.

Ideal candidates are pursuing a Bachelor’s or Master’s in Mechanical or Aerospace Engineering with hands-on lab or internship experience, strong problem-solving skills, and a passion

Qualifications

• Currently pursuing a Bachelor's or Master's degree in Mechanical Engineering, Aerospace Engineering, or a related field.
• Rising junior, senior, or graduate-level student preferred.
• Strong academic record with relevant coursework in mechanical design, propulsion, power systems, or related fields.
• Hands-on experience through lab work, projects, or internships is a plus.
• Passion for aerospace, defense technology, and innovative engineering solutions.
• Excellent problem-solving, analytical, and communication skills.
• Ability to work collaboratively in a fast-paced, team-oriented environment.

Responsibilities

• Assist in the design, analysis, and testing of components for missile subsystems, including propulsion, guidance systems, power electronics, and more.
• Support engineering teams with simulations, modeling, and prototyping of critical hardware components.
• Conduct research and development tasks, gathering and analyzing data to inform design decisions.
• Participate in system integration efforts, helping to assemble and test subsystems in real-world test environments.
• Collaborate cross-functionally with engineering, manufacturing, and test teams to ensure project success.
• Document design processes, test results, and project progress, contributing to the continuous improvement of our systems.
• Attend technical reviews, design meetings, and team briefings to stay engaged with project developments and learn from industry experts.

Skills

Strong academic record

Hands-on experience

Problem-solving

Communication skills

Team collaboration

Education

Bachelor's or Master's in Mechanical or Aerospace Engineering

Tools

State-of-the-art tools

Job description

Castelion is seeking a Winter/Spring 2027 Mechanical Engineering Internship Co-Op in Torrance, CA. You will design, analyze, and test components for missile subsystems, including propulsion and power electronics, while supporting simulations, prototyping, and system integration in a fast-paced startup environment.

Ideal candidates are pursuing a Bachelor’s or Master’s in Mechanical or Aerospace Engineering with hands-on lab or internship experience, strong problem-solving skills, and a passion