Weapons Integration Engineer (Multiple Levels)

Castelion Corporation•Torrance, CA

52d•Onsite

About The Position

Castelion is moving incredibly fast to develop and deliver advanced defense systems at a time when execution matters more than ever. We believe focus, ownership, and excellence are decisive advantages - and we're building a world-class team to turn bold ideas into real capability. This is a rare opportunity to join at an early stage, where you'll have significant ownership, collaborate with exceptional teammates, and make a direct, measurable impact on our mission and the future of the company - regardless of your function. As a Weapons Integration Engineer you will be part of the team that ensures Castelion weapon systems integrate seamlessly with ground launchers, tactical/multi-role aircraft, and future systems. You will own platform integration efforts from early concept and capability studies through prototype development, test, and operational deployment - collaborating with propulsion, avionics, GNC, software, flight test, and manufacturing teams to deliver mission-ready solutions.

Requirements

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: ability to synthesize complex technical information and communicate effectively 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
Ability to put in extended hours, including evenings and weekends, when required to meet aggressive timelines

Nice To Haves

Masters degree in a relevant technical field.
Hands-on experience with hypersonic weapons, missile defense, or platform integration
Strong background in mission design, development, integration, and test for missiles, spacecraft, or similar systems
Demonstrated success integrating weapons or sensors with tactical aircraft and/or ground-based launch systems
Active Top Secret/SCI clearance preferred

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.