Weapons Integration Engineer – Mission Systems

Castelion Corporation; Torrance (CA); On-site; USD 120,000 - 180,000; Full time

Job summary

Castelion is seeking a Weapons Integration Engineer (multiple levels) to join our on-site team in Torrance, CA. You will own platform integration from early concept through prototype development to deployment, coordinating with propulsion, avionics, GNC, software, flight test, and manufacturing teams to deliver mission-ready solutions.

The role requires 2+ years in defense or aerospace, strong analytical and communication skills, and the ability to obtain Top Secret/SCI clearance.

Qualifications

• Bachelors degree in aerospace, mechanical, electrical engineering, physics, or related field.
• 2+ years in systems engineering, mission/weapon integration, or related roles.
• 2+ years in technical project management or weapons system development.
• Hands-on experience with launch vehicles, weapons systems, or aerospace defense platforms.
• Experience with DoD or national security agencies.
• Strong analytical and communication skills.
• Ability to obtain Top Secret/SCI clearance.
• Willingness to travel up to 25%.

Responsibilities

• Serve as the primary technical liaison between Castelion and government customers and external stakeholders.
• Support development of advanced weapon concepts with emphasis on missile integration.
• Develop and execute fast-paced integration plans and schedules.
• Lead mission planning, verification, and test efforts (live-fire and flight tests).
• Review interface specs and close interface gaps.
• Collaborate across internal engineering teams to optimize system performance.
• Develop integration documentation and certification artifacts for customer acceptance.
• Represent Castelion at customer meetings, design reviews, and demonstrations.
• Ensure contract deliverables meet requirements, schedule, and quality.

Skills

Systems engineering

Weapon integration

Project management

Launch vehicles

DoD experience

Clearance TS/SCI

Travel 25%

Technical communication

Cross-functional collaboration

Education

Bachelor's degree in aerospace, mechanical, electrical engineering, physics, or related field

Master's degree in a relevant field

Job description

Castelion is seeking a Weapons Integration Engineer (multiple levels) to join our on-site team in Torrance, CA. You will own platform integration from early concept through prototype development to deployment, coordinating with propulsion, avionics, GNC, software, flight test, and manufacturing teams to deliver mission-ready solutions.

The role requires 2+ years in defense or aerospace, strong analytical and communication skills, and the ability to obtain Top Secret/SCI clearance.