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Castelion Careers — 178 Open Jobs | BuildList

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Castelion

Scales modern defense manufacturing.

DefenseSeries B

HQ

El Segundo, CA

Founded

2022

Employees

51-200

Total Raised

$488.3M

Last Round

Series B

Last Round Date

Aug 2025

Castelion is a defense company based in El Segundo, CA, founded 2022. The company is at the Series B stage, having raised $488.3M, with 51-200 employees. Castelion is hiring for 178 open roles, listed below.

Updated Feb 2026

Founders

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Andrew Kreitz

Previous Companies

SpaceXGoldman SachsKPMG

Bryon Hargis

Previous Companies

Sean Pitt

Previous Companies

178 jobs

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Castelion Jobs & Careers (178)

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Defense

Defense📣 Business Dev & Customer Ops · Director

Business Development Director – Air Force Programs

Washington, D.C.

Defense🏭 Manufacturing & Production · Director

Director of Manufacturing

Rio Rancho, NM

Defense🏭 Manufacturing & Production · Director

Director of Manufacturing

Torrance, CA

Defense📑 Finance, Legal, & Compliance · Director

Environmental Manager

Torrance, CA

Defense👥 Business & People Ops · Manager

Facilities Manager

Midland, TX

Defense✅ Test, Quality, & Reliability · Manager

Lead Integration & Test Engineer

Rio Rancho, NM

Defense👥 Business & People Ops · Manager

EHS Site Manager

Rio Rancho, NM

Defense⚡ Electrical & Firmware · Manager

Tooling, Automation & Controls Manager

Torrance, CA

Defense🏭 Manufacturing & Production · Manager

Lead Manufacturing Engineer - Motors

Defense🔒 Infrastructure, IT, & Security · Manager

Senior Manager, Classified Networks Administration

Torrance, CA

Defense🔒 Infrastructure, IT, & Security · Manager

Senior Manager – Cybersecurity Operations

Torrance, CA

Defense🏭 Manufacturing & Production · Manager

Lead Manufacturing Engineer - Avionics

Defense👥 Business & People Ops · Manager

Human Resources Manager

Rio Rancho, NM

Defense📑 Finance, Legal, & Compliance · Manager

Inventory and Cost Accounting Manager

Torrance, CA

Defense📋 Product, Programs, & Systems · Manager

Construction Project Manager

Torrance, CA

Defense🏭 Manufacturing & Production · Manager

Production Supervisor – R&D

Torrance, CA

Defense🏭 Manufacturing & Production · Manager

Energetics Safety Manager

Midland, TX

Defense✅ Test, Quality, & Reliability · Manager

Lead R&D Technician

Torrance, CA

Defense👥 Business & People Ops · Manager

Facilities Manager

Rio Rancho, NM

Defense✅ Test, Quality, & Reliability · Manager

Lead Avionics Test Engineer

Torrance, CA

Defense🔒 Infrastructure, IT, & Security · Manager

Information Systems Security Manager (ISSM)

Torrance, CA

Defense🎨 Marketing & Design · Manager

Manager, Social Media & Strategic Communications

Torrance, CA · Washington, D.C.

Defense👥 Business & People Ops · Manager

Senior Manager, Physical Security

Torrance, CA

Defense📦 Supply Chain & Procurement · Manager

Logistics and Materials Operations Lead

Rio Rancho, NM

Defense⚙️ Mechanical & Physical Systems · Manager

Materials & Process, Program Support Manager

Torrance, CA

Defense🎨 Marketing & Design · Manager

Manager, Regional Engagement, Project Ranger

Rio Rancho, NM

Defense✅ Test, Quality, & Reliability · Manager

Manager, Development Test

Torrance, CA

Defense🏭 Manufacturing & Production · Manager

Site Operations Manager

Midland, TX

Defense🏭 Manufacturing & Production · Manager

Avionics Manufacturing Supervisor

Torrance, CA

Defense⚙️ Mechanical & Physical Systems · Manager

Manager, Propulsion Engineering

Torrance, CA

Defense👥 Business & People Ops · Manager

Facilities Manager

Torrance, CA

Defense👥 Business & People Ops · Manager

Supervisor, Physical Security (Armed)

Albuquerque, NM

Defense✅ Test, Quality, & Reliability · Staff / Principal

Principal Build Reliability Engineer

Torrance, CA

Defense⚡ Electrical & Firmware · Staff / Principal

Staff Electrical Engineer - Flight Computers

Torrance, CA

Defense💻 Software & Data · Staff / Principal

Lead Flight Software Engineer

Torrance, CA

Defense⚙️ Mechanical & Physical Systems · Senior

Senior Warhead Design Engineer

Torrance, CA

Defense✅ Test, Quality, & Reliability · Senior

Lead Integration & Test Engineer

Torrance, CA

Defense🏭 Manufacturing & Production · Senior

Senior Composites R&D Technician - Layup

Torrance, CA

Defense🏭 Manufacturing & Production · Senior

Senior Manufacturing Engineer, Radar

Torrance, CA

Defense🤖 AI & Autonomy · Senior

Senior GNC Engineer (Navigation)

Rio Rancho, NM

Defense⚡ Electrical & Firmware · Senior

Lead Avionics Engineer - Flight Termination System

Torrance, CA

Defense🔒 Infrastructure, IT, & Security · Senior

IT Network Engineer

Rio Rancho, NM

Defense📦 Supply Chain & Procurement · Senior

Production Coordinator

Torrance, CA

Defense✅ Test, Quality, & Reliability · Senior

Senior Integration & Test Engineer

Torrance, CA

Defense⚡ Electrical & Firmware · Senior

HWIL FPGA Engineer

Allen, TX

Defense⚙️ Mechanical & Physical Systems · Senior

Senior Materials & Process Engineer, Materials Testing

Defense⚙️ Mechanical & Physical Systems · Senior

Senior Mechanical Design Engineer (ACS Systems)

Rio Rancho, NM

Defense🏭 Manufacturing & Production · Senior

Avionics Manufacturing Specialist (PCBA)

Torrance, CA

Defense⚡ Electrical & Firmware · Senior

Torrance, CA

Defense⚙️ Mechanical & Physical Systems · Senior

Senior Propulsion Engineer

Rio Rancho, NM

Defense📑 Finance, Legal, & Compliance · Senior

Senior Counsel, Trade & Export Compliance

Torrance, CA · Washington, D.C.

Defense💻 Software & Data · Senior

Flight Software Engineer (All Levels)

Torrance, CA

Defense👥 Business & People Ops · Senior

Senior Technical Sourcer (Contract)

Torrance, CA

Defense🤖 AI & Autonomy · Senior

Senior GNC Engineer

Torrance, CA

Defense⚙️ Mechanical & Physical Systems · Senior

Senior Thermal & TPS Integration Engineer

Rio Rancho, NM

Defense🏭 Manufacturing & Production · Senior

Avionics R&D Tech II/Senior (PCBA)

Torrance, CA

Defense✅ Test, Quality, & Reliability · Senior

Senior Test Engineer

Torrance, CA

Defense⚡ Electrical & Firmware · Senior

Senior Power Electronics Engineer

Torrance, CA

Defense⚡ Electrical & Firmware · Senior

Senior PCB Design Engineer

Torrance, CA

Defense⚡ Electrical & Firmware · Senior

Senior FPGA Engineer

Allen, TX

Defense🏭 Manufacturing & Production · Senior

Industrial Chemical Engineer - Wet Chemistry

Defense⚡ Electrical & Firmware · Senior

Senior Electrical Engineer (PCB Layout)

Torrance, CA

Defense🏭 Manufacturing & Production · Senior

Senior Manufacturing Engineer – Warhead Integration & Test

Torrance, CA

Defense✅ Test, Quality, & Reliability · Senior

Quality Systems Engineer

Torrance, CA

Defense⚙️ Mechanical & Physical Systems · Senior

Senior Mechanical Design Engineer (RF Systems & Radomes)

Rio Rancho, NM

Defense💻 Software & Data · Senior

Senior Radar Algorithm Engineer

Allen, TX

Defense⚙️ Mechanical & Physical Systems · Senior

Senior Propulsion Engineer

Torrance, CA

Defense🏭 Manufacturing & Production · Senior

Senior Manufacturing Engineer, Solid Rocket Motors

Torrance, CA

Defense🏭 Manufacturing & Production · Senior

Manufacturing Engineer, Propellant

Torrance, CA

Defense🏭 Manufacturing & Production · Senior

Senior Manufacturing Engineer, Radar

Allen, TX

Defense🏭 Manufacturing & Production · Senior

Torrance, CA

Defense🏭 Manufacturing & Production · Senior

Manufacturing Engineer, Propellant

Rio Rancho, NM

Defense🏭 Manufacturing & Production · Senior

Senior Manufacturing Engineer, Filament Winding

Torrance, CA

Defense🏭 Manufacturing & Production · Senior

Senior R&D Technician - Mechanisms

Torrance, CA

Defense🏭 Manufacturing & Production · Senior

Senior Manufacturing Engineer - Machining

Torrance, CA

Defense⚡ Electrical & Firmware · Senior

Senior Autonomous Flight Termination System Hardware Engineer

Rio Rancho, NM

Defense🤖 AI & Autonomy · Senior

Senior GNC Engineer (Navigation)

Torrance, CA

Defense⚡ Electrical & Firmware · Senior

Senior Control Electronics Engineer

Rio Rancho, NM

Defense🤖 AI & Autonomy · Senior

Senior GNC Engineer

Rio Rancho, NM

Defense⚙️ Mechanical & Physical Systems · Senior

Senior Mechanisms Engineer

Torrance, CA

Defense🔒 Infrastructure, IT, & Security · Senior

Senior Software Security Engineer

Torrance, CA

Defense⚡ Electrical & Firmware · Senior

Senior Power Electronics Engineer

Rio Rancho, NM

Defense💻 Software & Data · Senior

Senior Simulation Software Engineer, GNC

Torrance, CA

Defense🏭 Manufacturing & Production · Senior

Avionics R&D Tech II/Senior (Integration)

Torrance, CA

Defense⚡ Electrical & Firmware · Senior

Senior RF Systems Engineer

Allen, TX

Defense⚙️ Mechanical & Physical Systems · Senior

Senior Guidance Systems Engineer

Rio Rancho, NM

Defense👥 Business & People Ops · Senior

Human Resources Business Partner

Torrance, CA

Defense✅ Test, Quality, & Reliability · Senior

Senior Avionics Test Engineer

Torrance, CA

Defense⚙️ Mechanical & Physical Systems · Senior

Senior Propulsion Engineer (Rocket Motors)

Rio Rancho, NM

Defense⚙️ Mechanical & Physical Systems · Senior

Senior Mechanical Design Engineer (Structures & Thermal Protection Integration)

Rio Rancho, NM

Defense⚙️ Mechanical & Physical Systems · Senior

Senior Materials & Process Engineer, Propellant Mix & Cast

Torrance, CA

Defense⚡ Electrical & Firmware · Senior

Senior Control Electronics Engineer

Torrance, CA

Defense⚡ Electrical & Firmware · Senior

Senior Avionics Systems Integration Engineer

Torrance, CA

Defense🏭 Manufacturing & Production · Senior

Senior Manufacturing Engineer

Torrance, CA

Defense📋 Product, Programs, & Systems · Senior

Senior System Safety Engineer

Torrance, CA

Defense⚙️ Mechanical & Physical Systems · Senior

Senior Materials & Process Engineer, Non-Metals

Torrance, CA

Defense⚡ Electrical & Firmware · Senior

Senior Autonomous Flight Termination System Hardware Engineer

Torrance, CA

Defense⚙️ Mechanical & Physical Systems · Senior

Senior Propulsion & Ordnance Engineer

Rio Rancho, NM

Defense🏭 Manufacturing & Production · Senior

Senior Manufacturing Engineer - Composites

Torrance, CA

Defense🏭 Manufacturing & Production · Senior

Senior Tooling Engineer

Torrance, CA

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