Weapons Systems Integration Engineer — Ground & Air Platforms

Castelion; Torrance (CA); On-site; USD 90,000 - 150,000; Full time

Job summary

Castelion is hiring a Weapons Integration Engineer in Torrance, CA to ensure seamless integration of weapon systems with ground launchers and aircraft. You will own integration efforts from concept to deployment, coordinating with propulsion, avionics, GNC, software, flight test, and manufacturing teams.

The role requires collaboration across engineering disciplines, development of integration plans, and leadership in test campaigns.

Qualifications

• Bachelors degree in aerospace, mechanical, electrical engineering, physics, or related technical field.
• 2+ years experience in systems engineering, mission/weapon integration, or related roles within defense or aerospace.
• 2+ years experience in technical project management or weapons system development.
• Hands-on experience with launch vehicles, weapons systems, system integration, or aerospace defense platforms
• Experience working with the DoD or other national security agencies.
• Strong analytical skills and ability to communicate to engineers and non-technical stakeholders
• Ability to obtain and maintain Top Secret/SCI clearance
• Ability to travel up to 25% for customer meetings, test campaigns, and program execution

Responsibilities

• Serve as the primary technical liaison between Castelion and government customers, platform manufacturers, and other external stakeholders to ensure alignment between mission requirements and system designs.
• Support development of advanced weapon concepts and technologies, with emphasis on missile integration for ground launchers and tactical aircraft.
• Develop, maintain, and execute fast-paced integration plans and schedules to deliver and field weapon systems.
• Lead mission planning, verification, and test efforts (including live-fire and flight tests): pre-test analysis, real-time mission support, and post-test evaluation and reporting.
• Review and assess interface specifications, drawings, and design documents for functional, electrical, software, and physical interfaces; identify and close interface gaps.
• Collaborate across internal engineering teams (propulsion, avionics, GNC, software, flight test, manufacturing) to perform design trades and optimize overall system performance with a focus on platform compatibility.
• Develop and coordinate technical specifications, integration documentation, and certification/supporting artifacts required for customer acceptance and regulatory compliance.
• Represent Castelion at customer meetings, design reviews, test campaigns, and demonstrations.
• Ensure contract deliverables meet customer requirements, schedule, and quality standards.

Skills

Systems engineering

Mission integration

Technical liaison

Project management

Communication

Education

Bachelors in Engineering (aerospace/mechanical/electrical/physics)

Tools

Launch vehicles

Weapons systems

System integration

Job description

Castelion is hiring a Weapons Integration Engineer in Torrance, CA to ensure seamless integration of weapon systems with ground launchers and aircraft. You will own integration efforts from concept to deployment, coordinating with propulsion, avionics, GNC, software, flight test, and manufacturing teams.

The role requires collaboration across engineering disciplines, development of integration plans, and leadership in test campaigns.