Castelion · 4 months ago
Weapons Integration Engineer
Torrance, California, United States
Full-time
Onsite
Entry, Mid Level
2+ years expCastelion is focused on innovative defense development and production strategies. The Weapons Integration Engineer will ensure seamless integration of weapon systems with various platforms and lead the integration efforts from concept through operational deployment.
AerospaceGovernmentManufacturingMilitaryNational Security
No H1B
Security Clearance RequiredU.S. Citizen Only
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
Qualification
Required
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
Preferred
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
Benefits
Long-term stock incentives
Comprehensive medical, vision, and dental insurance
Four weeks of paid time off per year
Company
Castelion
Castelion is a defense tech company that applies modern hardware development and manufacturing processes to national security challenges.
51-200 employees
Funding
Current Stage
Growth StageTotal Funding
$469.61MKey Investors
Altimeter Capital,Lightspeed Venture PartnersLightspeed Venture PartnersSilicon Valley Bank
2025-12-05Series B· $350M
2025-01-29Series A· $70M
2025-01-29Debt Financing· $30M
Leadership Team
Bryon Hargis
Founder // CEO
Andrew Kreitz
Co-Founder and CFO
Recent News
alleywatch.com
2026-01-23
Company data provided by crunchbase