Castelion

Castelion is a venture-backed defense tech company applying modern hardware development and manufacturing processes to critical national security challenges, specifically to solve affordability, scale, and supply chain robustness. The company combines vertical integration, rapid iteration, and high-

• Team: 51-200
• Headquarters: El Segundo, CA, USA
• Funding: Series B
• Sectors: Govtech, Defense, Industrial

159 open roles

• EHS Engineer — Midland, TX, USA
• Avionics Harness Design Engineer — torrance, ca, usa
• EHS Technician — torrance, ca, usa
• Manufacturing Engineer, Materials Manufacturing — torrance, ca, usa
• GNC Engineer — torrance, ca, usa
• Staff Dimensional Metrology Engineer — torrance, ca, usa
• GNC Engineer - Actuation Systems — torrance, ca, usa
• Senior Thermal Engineer — torrance, ca, usa
• Senior Tooling Fab Supervisor — torrance, ca, usa
• Senior Logistics Specialist — rio rancho, nm, usa
• Facilities Coordinator
• R&D Technician — Midland, TX, USA
• Software Security Engineer — torrance, ca, usa
• Contracts Manager — torrance, ca, usa
• Senior NDE Level II Technician — torrance, ca, usa
• Accounts Payable (AP) Specialist — torrance, ca, usa
• Sr. Buyer, Avionics, Strategic Sourcing — torrance, ca, usa
• Avionics Manufacturing Supervisor
• Lead Manufacturing Engineer - Avionics
• Avionics Manufacturing Engineer, Electrical Integration — torrance, ca, usa
• Environmental Manager — torrance, ca, usa
• Electrical Engineer — Allen, TX, USA
• HITL Test Infrastructure Engineer — Allen, TX, USA
• Structural Dynamics Engineer — torrance, ca, usa
• Senior Avionics Systems Engineer — torrance, ca, usa
• Instructional Designer — torrance, ca, usa
• Manufacturing Engineer, Propellant — torrance, ca, usa
• Site Operations Manager — Midland, TX, USA
• Human Resources Manager — rio rancho, nm, usa
• Senior Manager - Cybersecurity Operations — torrance, ca, usa
• Energetics Safety Manager — rio rancho, nm, usa
• Deputy Program Engineer, Hypersonic Strike — torrance, ca, usa
• Materials Engineer - Chemist — torrance, ca, usa
• SEM (Scanning Electron Microscopy) Characterization Technician — torrance, ca, usa
• Senior Guidance Systems Engineer — rio rancho, nm, usa
• Materials Engineer - Flight Vehicle Support — torrance, ca, usa
• Materials Engineering - Equipment Engineer (Automation & Controls) — torrance, ca, usa
• Materials & Process Technician - CVD (Night Shift, 230pm to 1130pm) — torrance, ca, usa
• Director, Business Development - Air Force Programs — Washington, DC, USA
• HWIL FPGA Engineer — Allen, TX, USA
• Principal Build Reliability Engineer — torrance, ca, usa
• Structural Analysis Engineer — torrance, ca, usa
• Manufacturing Engineer, Equipment — torrance, ca, usa
• Furnace Technician, Ceramic Matrix Composites — torrance, ca, usa
• Manager, Government and Community Affairs, Project Ranger — rio rancho, nm, usa
• Electrical Engineer Intern - Fall 2026 (Avionics) — torrance, ca, usa
• Senior Test Engineer — torrance, ca, usa
• IT Network Engineer — rio rancho, nm, usa
• Mission Design Engineer — torrance, ca, usa
• Quality Systems Engineer — torrance, ca, usa
• Senior Manufacturing Engineer, Solid Rocket Motors — torrance, ca, usa
• Ground Software Engineer — torrance, ca, usa
• Manufacturing Engineer, Chemical Vapor Deposition — torrance, ca, usa
• Industrial Chemical Engineer - Wet Chemistry
• Chemical Technician - Wet Chemistry — torrance, ca, usa
• Shipping and Receiving Specialist — torrance, ca, usa
• Machining Apprentice, Additive Manufacturing — torrance, ca, usa
• Avionics Hardware Engineer (All Levels) — torrance, ca, usa
• Senior Avionics Test Engineer — torrance, ca, usa
• Lead Avionics Test Engineer — torrance, ca, usa
• Senior Cybersecurity Analyst — torrance, ca, usa
• Composites Technician - Filament Winding — torrance, ca, usa
• Materials Engineer - High Temperature Composites — torrance, ca, usa
• Construction Project Manager — torrance, ca, usa
• CNC Machinist — torrance, ca, usa
• Senior Warhead Design Engineer — rio rancho, nm, usa
• Manager, Social Media & Strategic Communications — torrance, ca, usa
• Avionics R&D Tech II/Senior (Integration) — torrance, ca, usa
• Avionics R&D Tech II/Senior (PCBA) — torrance, ca, usa
• Senior Power Electronics Engineer — rio rancho, nm, usa
• Senior Control Electronics Engineer — rio rancho, nm, usa
• Senior Autonomous Flight Termination System Hardware Engineer — rio rancho, nm, usa
• Materials & Process, Program Support Manager — torrance, ca, usa
• Senior Manufacturing Engineer — torrance, ca, usa
• Senior Mechanical Design Engineer (Structures & Thermal Protection Integration) — rio rancho, nm, usa
• Senior Propulsion Engineer (Rocket Motors) — rio rancho, nm, usa
• Senior Mechanisms Engineer (TVC Actuation) — rio rancho, nm, usa
• Senior Mechanical Design Engineer (RF Systems & Radomes) — rio rancho, nm, usa
• Senior Mechanisms Engineer — rio rancho, nm, usa
• Senior Mechanical Design Engineer (ACS Systems) — rio rancho, nm, usa
• Senior GNC Engineer (Navigation) — rio rancho, nm, usa
• Senior Structures & Composites Engineer (Rocket Motor Cases) — rio rancho, nm, usa
• Senior Thermal & TPS Integration Engineer — rio rancho, nm, usa
• Senior Propulsion Engineer (Rocket Motor Soft Goods) — rio rancho, nm, usa
• Senior Propulsion & Ordnance Engineer — rio rancho, nm, usa
• Weapons Integration Engineer (Multiple Levels) — torrance, ca, usa
• Logistics and Materials Operations Lead — rio rancho, nm, usa
• Facilities Manager — rio rancho, nm, usa
• People Operations Specialist — torrance, ca, usa
• Tooling, Automation & Controls Manager — torrance, ca, usa
• Office Manager — Washington, DC, USA
• Flight Software Engineer (All Levels)
• Build Reliability Engineer
• Manufacturing Engineer, Solid Rocket Motors — Midland, TX, USA
• Senior Materials & Process Engineer, Materials Testing
• Lead R&D Technician — torrance, ca, usa
• Senior Manufacturing Engineer, Filament Winding
• Avionics Manufacturing Specialist (PCBA) — torrance, ca, usa
• Senior Legal Counsel, Government Contracts — Washington, DC, USA
• Senior Propulsion Engineer — torrance, ca, usa
• Production Supervisor - R&D — torrance, ca, usa
• Senior Radar Algorithm Engineer — Allen, TX, USA
• Senior GNC Engineer — torrance, ca, usa
• EMI EMC Engineer — torrance, ca, usa
• Manager, Development Test — torrance, ca, usa
• Lead Flight Software Engineer — torrance, ca, usa
• Senior R&D Technician - Mechanisms — torrance, ca, usa
• Product Security Architect, Embedded Systems — torrance, ca, usa
• Senior FPGA Engineer — Allen, TX, USA
• Senior Embedded Software Engineer — Allen, TX, USA
• Senior Technical Sourcer (Contract) — torrance, ca, usa
• Composites Specialist - Chemical Vapor Deposition (CVD) — torrance, ca, usa
• Composites R&D Technician - Chemical Vapor Deposition (CVD) — torrance, ca, usa
• Senior RF Systems Engineer — Allen, TX, USA
• Shipping and Receiving Associate — torrance, ca, usa
• Systems Test Engineer — Allen, TX, USA
• Lead Integration & Test Engineer — rio rancho, nm, usa
• Senior Cybersecurity Architect — torrance, ca, usa
• Senior Composites R&D Technician - Layup — torrance, ca, usa
• Senior Materials & Process Engineer, Non-Metals — torrance, ca, usa
• Dimensional/Mechanical Inspector — torrance, ca, usa
• Production Scheduler — torrance, ca, usa
• Inventory Specialist — torrance, ca, usa
• Launch R&D Technician — torrance, ca, usa
• Avionics/Electrical Quality Inspector — torrance, ca, usa
• Senior Manufacturing Engineer, Radar — Allen, TX, USA
• Senior Manufacturing Engineer - Warhead Integration & Test — torrance, ca, usa
• R&D Technician - Structural Welding — torrance, ca, usa
• Senior Materials & Process Engineer, Propellant Mix & Cast — torrance, ca, usa
• Avionics Reliability Engineer — torrance, ca, usa
• Senior System Safety Engineer — torrance, ca, usa
• Inventory and Cost Accounting Manager — torrance, ca, usa
• Manufacturing Specialist (Solid Rocket Motor Production) — Midland, TX, USA
• Manufacturing Engineer, PCBA — torrance, ca, usa
• Manufacturing Engineer, Harnessing — torrance, ca, usa
• Flight Test Engineer — torrance, ca, usa
• Production Coordinator — torrance, ca, usa
• PCB Layout Engineer, Senior — torrance, ca, usa
• PCB Librarian — torrance, ca, usa
• Development Test Engineer — torrance, ca, usa
• Director of Manufacturing — rio rancho, nm, usa
• Senior Integration & Test Engineer — torrance, ca, usa
• Senior Simulation Software Engineer, GNC — torrance, ca, usa
• Senior Manufacturing Engineer - Propellant Mixing & Casting
• Lead Manufacturing Engineer - Motors
• Senior Tooling Engineer — torrance, ca, usa
• Technical Recruiter — torrance, ca, usa
• Automation and Controls Engineer — torrance, ca, usa
• Program Manager — torrance, ca, usa
• Mission Integration Engineer — torrance, ca, usa
• Senior Manufacturing Engineer - Machining — torrance, ca, usa
• Lead Avionics Engineer - Flight Termination System — torrance, ca, usa
• Senior PCB Design Engineer — torrance, ca, usa
• Embedded Software Engineer (All Levels) — torrance, ca, usa
• Senior Avionics Systems Integration Engineer — torrance, ca, usa
• Staff Electrical Engineer - Flight Computers — torrance, ca, usa
• Systems Integration & Test Engineer, Avionics (All Levels) — torrance, ca, usa
• Senior Manufacturing Engineer - Composites — torrance, ca, usa
• Embedded Software Engineer Intern - Fall 2026 — torrance, ca, usa