Our Mission
Castelion designs, tests, and manufactures next-generation military systems rapidly and at massive scale to deter future wars.
Peace Through Deterrence
Hardware Designed for Production at Scale
Castelion delivers the capabilities America needs to preserve peace through credible, non-nuclear deterrence. We build at the scale national security demands – optimizing every system for cost, manufacturability, and rapid deployment.
Hardware Rich.
Rapid Test and Iteration.
Designed for Scaled Manufacturing.
Affordable Hypersonic Weapons, Built Fast
At Castelion, speed and cost aren’t tradeoffs – they’re requirements. We vertically integrate core technologies to move faster, reduce risk, and control cost at scale. Every system is designed for manufacturability from day one, enabling rapid iteration and high-volume production. In today’s threat environment, speed matters. Affordability matters. We’re building with both.
Protecting Democracy
Our mission is rooted in the belief that freedom must be actively protected – through technological strength, strategic clarity, and national resolve. By restoring America’s ability to out-innovate and out-produce its rivals, we help ensure that the free world remains secure for generations to come.
Hardware Rich
Rapid Testing
Iterative Design
America Needs You!
Ready to get your hands on real hardware, own critical projects, and make your work count? Explore our open roles and help shape the future of defense.
Featured Positions
Choose your next adventure with Castelion.
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Automation and Controls Engineer
The Automation and Controls Engineer will design, build, and commission robust manufacturing systems for production of hypersonic-flight components. Success requires the practical application of engineering principles to design, build, test, and integrate process equipment and technologies within our production line. We are seeking a hands-on problem solver with strong expertise in electro-mechanical system design and automation systems, as well as experience working with machinery and production environments. The key to excelling in this position is the effective application of mechanical, electrical, and control systems expertise to enable our manufacturing processes.- Torrance, CA
- Full time
- In-house
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Avionics Reliability Engineer
We are hiring an Avionics Reliability Engineer to own environmental qualification and reliability validation across our avionics hardware. This role is responsible for developing and executing reliability test strategies, including HALT/HASS campaigns, and driving hardware improvement through deep failure analysis and cross-functional collaboration. This position is ideal for engineers who want hands-on ownership of environmental testing infrastructure and reliability processes while working closely with avionics design and manufacturing teams to rapidly mature flight hardware.- Torrance, CA
- Full time
- In-house
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Development Test Engineer
The Development Test Engineer owns the planning, execution, and analysis of tests that turn designs into flight-ready hardware. This role sits at the center of engineering, manufacturing, and operations—translating requirements into real-world validation through benchtop, environmental, subsystem, and vehicle-level testing. You will design test hardware, write procedures, run tests, break things early, and close the loop back into design with clear data and recommendations.- Torrance, CA
- Full time
- In-house
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Director of Manufacturing
We’re seeking a Director of Manufacturing to lead our Los Angeles based manufacturing operations — our modern Arsenal of Democracy — delivering hypersonic capability at scale to deter future conflicts. In this pivotal leadership role, you will build and lead a world‑class manufacturing operation, pushing for innovation and operational excellence that positions us as the nation’s premier hypersonic producer.- Torrance, CA
- Full time
- In-house
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EHS Site Manager
The EHS Manager will lead Environmental, Health, and Safety efforts for Castelion’s Rio Rancho, New Mexico facility, supporting solid rocket motor manufacturing, integration, and test operations. This role is responsible for building and managing site EHS programs to ensure safe operations and regulatory compliance within a fast-paced, high-hazard manufacturing environment.- Rio Rancho, NM
- Full time
- In-house
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Electrical Engineer
As an Electrical Engineer, you will become the Responsible Engineer for multiple mission-critical circuit card assemblies (CCAs) that power Castelion’s flight systems.- Allen, TX
- Full time
- In-house
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Embedded Software Engineer (All Levels)
As an Embedded Software Engineer you will be at the forefront of creating, developing, and testing the software that drives and simulates our flight systems. Your role involves close collaboration with fellow Castelion engineers across software and hardware domains to implement and debug software across the entire technology stackfrom applications and operating systems to networking, firmware, and simulationensuring complete mission success. We seek intelligent, collaborative, and driven engineers who are passionate about problem-solving and eager to contribute to an extraordinary mission. If you thrive in challenging environments and are excited by the prospect of making a tangible impact, we want to hear from you.- Torrance, CA
- Full time
- In-house
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Embedded Software Engineer Intern – Fall 2026
Castelion is seeking motivated and talented embedded software engineering interns for 2025. Youll help create the software that drives and simulates our missile systems, from low-level firmware on microcontrollers to high-level integration and testing tools. Youll work alongside experienced embedded, hardware, and flight systems engineers to design, implement, test, and debug real systems in the loop. You wont be writing throwaway code; your contributions will directly support our rapid prototyping and real-world tests.- Torrance, CA
- Full time
- In-house
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Energetics Safety Manager
The Energetics Safety Manager leads Castelion’s enterprise Energetics Safety Program and is responsible for establishing the policies, standards, procedures, training, and risk management framework needed to support the safe design, manufacture, storage, transportation, testing, and disposal of energetic materials.- Rio Rancho, NM
- Full time
- In-house
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Facilities Manager
We are seeking a highly proactive, hands-on Facilities Manager to lead the development, operations, and continuous improvement of Castelion’s new 1,000-acre site in New Mexico. This role is critical to enabling safe, reliable, and scalable operations across engineering, manufacturing, and office environments. You will serve as the primary owner of the facility, balancing immediate operational needs with long-term site development as the company rapidly grows.- Rio Rancho, NM
- Full time
- In-house
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Facilities Manager
We are seeking a highly proactive, hands-on Facilities Manager to own the day-to-day operations, maintenance, and continuous improvement of Castelion’s facilities. This role is critical to enabling safe, reliable, and scalable operations across engineering, manufacturing, and office environments. You will serve as the primary owner of facilities performance – balancing immediate operational needs with longer-term planning as the company rapidly grows. The ideal candidate thrives in fast-paced environments, takes pride in operational excellence, and brings a strong sense of ownership, urgency, and attention to detail.- Torrance, CA
- Full time
- In-house
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Flight Test Engineer
As a Flight Test Engineer at Castelion, you will be working within the Test Operations and Logistics team to execute a rapid iterative development and test campaign. You will work alongside a test director to plan and execute flight tests, following best practices and processes to document and communicate to internal and external stakeholders. This role is hands-on and collaborative, working closely with engineering design teams to ensure flight tests provide the insight in vehicle performance required to rapidly close on a production design.- Torrance, CA
- Full time
- In-house
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Human Resources Business Partner
The Human Resources Business Partner (HRBP) serves as a strategic advisor to leaders and employees, helping drive organizational effectiveness, talent development, and workforce performance across Castelion.- Torrance, CA
- Full time
- In-house
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Human Resources Manager
We are seeking a Human Resources Manager responsible for launching and supporting people operations of a new manufacturing facility during a period of rapid growth. This role is highly operational and partners directly with leadership to build a high-performing workforce, establish a strong employee culture, and ensure exceptional execution of day-to-day HR operations.- Rio Rancho, NM
- Full time
- In-house
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Inventory and Cost Accounting Manager
The Inventory and Cost Accounting Manager will play a key role in leading, developing, and analyzing inventory and cost-related activities in a dynamic manufacturing environment. This individual will be responsible for ensuring accurate inventory records, maintaining inventory reconciliations, analyzing standard vs. actual costs, and working closely with the production and engineering teams to ensure accurate and timely routing updates. Proficiency in NetSuite Inventory Management, Manufacturo MES, or comparable systems is strongly preferred.- Torrance, CA
- Full time
- In-house
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Lead Avionics Engineer – Flight Termination System
As the Lead Avionics Engineer specializing in Flight Termination Systems (FTS), you will be responsible for the design, development, testing, and qualification of systems that ensure the safe termination of a flight if it deviates from its planned trajectory. You will work with both hardware and software components, as well as coordinating with various key stakeholders.- Torrance, CA
- Full time
- In-house
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Lead Flight Software Engineer
As a Lead Flight Software Engineer, you will serve as a key technical leader within Castelion’s Flight Software organization. You will work closely with the Head of Flight Software to define architecture, guide engineering direction, and ensure reliable delivery of mission-critical embedded software across the vehicle stack. In addition to owning complex subsystems, you will mentor engineers, coordinate cross-functional efforts, and set the technical tempo for the team. This role is ideal for engineers who combine deep technical expertise with an ability to lead others, influence system-level decisions, and thrive in a fast-moving, highly integrated hardware – software environment.- Torrance, CA
- Full time
- In-house
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Logistics and Materials Operations Lead
We are looking for a Logistics & Materials Operations Lead to own and scale logistics operations for our New Mexico production facility.- Rio Rancho, NM
- Full time
- In-house
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Manager, Government and Community Affairs, Project Ranger
The Manager, Regional Engagement, Project Ranger will lead Castelion’s local and regional engagement strategy in New Mexico. This person will be responsible for building and maintaining trusted relationships with community leaders, local and state officials, workforce development partners, educational institutions, business groups, and other key stakeholders.- Rio Rancho, NM
- Full time
- In-house
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Manufacturing Engineer, Propellant
We are seeking a Propellant Manufacturing Engineer to lead and execute propellant manufacturing processes for solid rocket motors (SRM) supporting Castelion’s hypersonic strike programs.- Rio Rancho, NM
- Full time
- In-house
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Manufacturing Engineer, Propellant
We are seeking a Propellant Manufacturing Engineer to lead and execute propellant manufacturing processes for solid rocket motors (SRM) supporting Castelion’s hypersonic strike programs.- Torrance, CA
- Full time
- In-house
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Manufacturing Engineer, Propellant
We are seeking a Propellant Manufacturing Engineer to lead and execute propellant manufacturing processes for solid rocket motors (SRM) supporting Castelion’s hypersonic strike programs.- Full time
- In-house
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Manufacturing Engineer, Solid Rocket Motors
Castelion is seeking a Manufacturing Engineer to support the development of the solid rocket motor systems required for the design and build of long-range hypersonic strike vehicles.- Full time
- In-house
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Mission Integration Engineer
As a Mission Integration Engineer, you will be the primary technical liaison between Castelion and our government customers, supporting the integration of advanced weapons systems into operational environments. You will drive the entire lifecycle of weapons programs, from early capability studies through prototype development, test, and operational deployment.- Torrance, CA
- Full time
- In-house
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Office Manager
We are seeking a highly organized, proactive Office Manager to own the day-to-day operations of Castelion’s Washington DC office, which serves as a key hub for customer engagement, executive meetings, and external events. This role is responsible for ensuring the office runs smoothly, professionally, and reliably.- Washington, D.C.
- Full time
- In-house
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People Operations Specialist
Castelion is looking for a People Operations Specialist to support and scale the systems and processes that power our team. This role sits at the intersection of HR and Recruiting, helping ensure we hire effectively, onboard seamlessly, and maintain strong operational rigor as we grow.- Torrance, CA
- Full time
- In-house
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Program Manager
As a Strike Weapon Program Manager, you will lead the execution of advanced hypersonic weapon programs from initial concept through delivery, serving as the primary interface with U.S. Government customers and internal engineering teams. You will own program schedules, contractual commitments, and mission success, driving efforts from proposal through design, integration, flight test, and fielding.- Torrance, CA
- Full time
- In-house
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R&D Technician
We are seeking an R&D Technician to support hands-on solid rocket motor (SRM) manufacturing and testing operations at Castelion’s development site.- Midland, TX
- Full time
- In-house
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Senior Avionics Systems Integration Engineer
Join Castelion and play a pivotal role in advancing the development of next-generation hypersonic missile systems. As an Avionics Systems Engineer, you’ll be part of a cross-disciplinary team responsible for the seamless integration of avionics systems across design, development, testing, and operations. You’ll directly impact mission-critical systems that shape national defense and peace through deterrence.- Torrance, CA
- Full time
- In-house
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Senior FPGA Engineer
Castelion is seeking a Senior FPGA Engineer with strong experience in Vitis HLS and High-Level Synthesis workflows to support the development of high-performance digital systems for mission-critical hardware. This is a high-impact, full-time role focused on accelerating FPGA development by translating algorithmic and system-level requirements into efficient FPGA implementations using C/C++-based design flows.- Allen, TX
- Full time
- In-house
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Senior GNC Engineer
As a GNC Engineer at Castelion, you will be at the forefront of developing and refining the control systems that guide and control our advanced missile systems. You will be responsible for controlled flight of development vehicles, focusing on aerodynamically efficient flight paths. This position offers the opportunity to work on cutting-edge technology, creating advanced flight control algorithms while validating simulation models through real-world testing. You will collaborate closely with cross-functional engineering teams to deliver accurate flight predictions, drive hardware specification, and conduct successful flight tests.- Torrance, CA
- Full time
- In-house
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Senior Legal Counsel, Government Contracts
Castelion is seeking an experienced Senior Legal Counsel, Government Contracts to serve as a critical partner to our engineering, program management, and business development teams. This role will own the full lifecycle of U.S. government contracting matters, enabling the company to move quickly and compliantly as we scale advanced defense programs.- Washington, D.C.
- Full time
- In-house
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Senior Manufacturing Engineer – Machining
A a Senior Manufacturing Engineer – Machining, you will lead the rapid expansion of Castelion’s in-house machining capabilities, enabling our mission to fly early and often. This role is critical to our ability to quickly iterate, test, and deliver hardware. You’ll be responsible for standing up infrastructure, processes, and tools that accelerate prototype part delivery – minimizing the time from design release to parts in hand. Beyond rapid prototyping, you’ll also define best practices for design for manufacturability (DFM) of machined components and contribute to the long-term machining strategy for both prototyping and production environments.- Torrance, CA
- Full time
- In-house
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Senior Mechanical Design Engineer
Castelion is seeking a high output Senior Mechanical Design Engineer with a full stack, Responsible Engineer mindset and experience shipping flight hardware. This person will be responsible for critical flight structures and mechanism design and build efforts for Castelions hypersonic vehicles. The Senior Mechanical Engineer will work closely with a fast-moving team of peers and engineering leadership to ensure mission-critical hardware is delivered on time and meets demanding technical performance. A successful candidate will have significant experience delivering high-performance, mass-constrained hardware in a rapid development environment.- Torrance, CA
- Full time
- In-house
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Senior Propulsion Engineer
The Senior Propulsion Engineer’s primary responsibility is the design of solid rocket motor primary and secondary structures, along with propulsion components, with an emphasis on schedule, affordability and scale.- Torrance, CA
- Full time
- In-house
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Senior Propulsion Engineer
The Senior Propulsion Engineer’s primary responsibility is the design of solid rocket motor primary and secondary structures, along with propulsion components, with an emphasis on schedule, affordability and scale.- Rio Rancho, NM
- Full time
- In-house
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Senior Radar Algorithm Engineer
As a Senior Radar Algorithm Engineer, you will develop and deploy advanced algorithms for air-to-air radar systems operating in contested, modern electronic warfare environments- Allen, TX
- Full time
- In-house
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Senior RF Systems Engineer
Castelion is building next-generation, high-performance systems where cost, scale, and speed matter as much as technical excellence. We are looking for an RF Systems Engineer to lead the design and development of a multi-channel exciter/receiver subsystem that interfaces between RF hardware and digital baseband systems.- Allen, TX
- Full time
- In-house
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Senior Simulation Software Engineer, GNC
We’re looking for a GNC Simulation Software Engineer to design, develop, and maintain high-fidelity simulation software supporting missile guidance, navigation, and control (GNC) development. In this role, you’ll work closely with GNC algorithm developers, flight software engineers, and test teams to create fast, accurate, and robust simulations that drive system architecture decisions, performance assessments, and mission success.- Torrance, CA
- Full time
- In-house
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Senior Warhead Design Engineer
We are seeking a hands-on, mission-driven Senior Warhead Design Engineer to lead the design, development, and integration of advanced next-generation systems for our long-range hypersonic strike vehicles.- Torrance, CA
- Full time
- In-house
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Senior Warhead Design Engineer
We are seeking a hands-on, mission-driven Senior Warhead Design Engineer to lead the design, development, and integration of advanced next-generation systems for our long-range hypersonic strike vehicles.- Rio Rancho, NM
- Full time
- In-house
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Shipping and Receiving Specialist
As a Shipping and Receiving Associate, you will play a key role in ensuring the smooth flow of materials in and out of our facility.- Rio Rancho, NM
- Full time
- In-house
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Site Operations Manager
We are seeking a Site Operations Manager to own end-to-end operations of Castelion’s R&D manufacturing and testing site for solid rocket motors (SRMs).- Full time
- In-house
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Staff Electrical Engineer – Flight Computers
We are hiring experienced Electrical Engineers to specialize in high-speed digital design, flight computer architecture, and advanced avionics hardware development across our avionics organization. This role is ideal for engineers with deep EE fundamentals and hands-on ownership experience designing complex embedded hardware for mission-critical systems. Engineers in this role focus on flight computer architecture, high-speed digital board design, system bring-up, and hardware validation across real flight hardware. The ideal candidate has experience owning complex board designs from architecture through integration and thrives in fast-paced hardware development environments.- Torrance, CA
- Full time
- In-house
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Systems Integration & Test Engineer, Avionics (All Levels)
We are looking for a Systems Integration & Test Engineer to architect and execute the full suite of hardware test capabilities needed to move our avionics and control systems from prototype to production. In this role, you will own test requirements, automated test equipment (ATE) development, integration, validation, and performance characterization across domains including power electronics, digital interfaces, RF assemblies, motion control, and flight avionics.- Torrance, CA
- Full time
- In-house
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Technical Recruiter
As a Technical Recruiter at Castelion, you will be a strategic partner to our hiring managers, driving the end-to-end recruitment process for technical roles. You’ll play a key role in identifying, engaging, and closing top-tier engineering and operations talent that aligns with our mission.- Torrance, CA
- Full time
- In-house
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Technical Recruiter
As a Technical Recruiter at Castelion, you will be a strategic partner to our hiring managers, driving the end-to-end recruitment process for technical roles. You’ll play a key role in identifying, engaging, and closing top-tier engineering and operations talent that aligns with our mission.- Rio Rancho, NM
- Full time
- In-house
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Tooling, Automation & Controls Manager
We are seeking a Manager of Tooling, Automation & Controls to lead the design, development, deployment, and sustainment of advanced manufacturing tooling and automated systems for hypersonic missile production.- Torrance, CA
- Full time
- In-house
Protecting Yourself from Recruitment Scams
Castelion will never contact candidates from Gmail or other personal email accounts, all official communication will come from the @castelion.com domain, and candidates should verify they are speaking with a real Castelion representative.
Castelion News
August 19, 2026
Castelion Raises $1B Series C to Scale Production of Low-Cost Hypersonic Weapons
Castelion, a cutting-edge defense technology company working to restore America’s conventional deterrence capability, today announced a $1 billion Series-C fundraise. This financing will accelerate the scaled production of Blackbeard, Castelion’s first low-cost, mass-producible hypersonic strike missile, while expanding the company’s product portfolio to longer-range strike weapons and defensive systems.
June 16, 2026
U.S. Navy Awards Castelion First Delivery Order for Blackbeard Hypersonic Weapon
Castelion has been awarded a $23.4M firm-fixed-price order from the U.S. Navy for the production and delivery of 50 Blackbeard early operational capability pre-production prototypes and 50 associated storage and shipping containers. Award marks first delivery of low-cost hypersonic strike weapons to the Navy
June 11, 2026
Saronic and Castelion to Demonstrate First-of-Its-Kind Maritime Hypersonic Launch Capability
The collaboration between Castelion and Saronic marks the first integration of autonomous surface vessels with hypersonics, and stands to accelerate distributed hypersonic capabilities by pairing Saronic’s autonomous surface vessels (ASVs) with Castelion’s low-cost hypersonics. The companies, both founded in late-2022, are targeting a demonstration in 2027.
May 13, 2026
Castelion and Department of War Sign Framework Agreement to Build Low-Cost Hypersonic Missiles for the Arsenal of Freedom
Multi-year procurement of 500 weapons annually in shift from development to production, targeting operational fielding at scale. The framework represents the first production agreement of its kind for a low-cost hypersonic weapon and directly advances the Department’s mandate to build credible deterrence at scale through the Arsenal of Freedom.