STEM Boomerang

NewBe an early applicant North AmericaFull-time

Facilities Manager

Cnc Emergency Response Root Cause Analysis

Castelion was founded to restore America’s ability to field advanced weapons at speed and scale. Inspired by the engineering urgency of the WWII and Apollo eras, we combine rapid iteration, vertical integration, and…

NewBe an early applicant North AmericaFull-timeSenior

Senior Guidance Systems Engineer

NewBe an early applicant North AmericaFull-timeSenior

Develops guidance algorithms for Castelion's long-range hypersonic strike vehicles, from concept through flight test and operational deployment. Day to day: 3DOF/6DOF trajectory simulation, real-time and onboard trajectory generation/optimization, and hands-on validation with multidisciplinary teams in a fast, hardware-rich flight environment.

Senior Control Electronics Engineer

NewBe an early applicant North AmericaFull-timeSenior

Designs and validates real-time electronic control systems — thrust vector control (TVC) and attitude control system (ACS) driver hardware — for Castelion's long-range hypersonic strike vehicles. Day to day is hands-on analog/mixed-signal circuit design, motor/valve driver electronics, lab bring-up, integration, and testing with multidisciplinary teams.

Senior Power Electronics Engineer

NewBe an early applicant North AmericaFull-timeSenior

Designs, tests, and validates electrical power systems — generation, storage, and distribution — for Castelion's long-range hypersonic strike vehicles, working hands-on with multidisciplinary teams. Core focus spans battery systems, DC-DC power conversion, power distribution, and circuit simulation with tools like SPICE and MATLAB/Simulink.

Senior Mechanical Design Engineer (ACS Systems)

NewBe an early applicant North America

Castelion was founded to restore America’s ability to field advanced weapons at speed and scale. Inspired by the engineering urgency of the WWII and Apollo eras, we combine rapid iteration, vertical integration, and…

Embedded Systems Engineer

Corrective Action C++ Embedded Software Embedded Systems Firmware +5 skills

Mantis Space, a venture-backed aerospace startup in Albuquerque building energy infrastructure for space, seeks an Embedded Systems Engineer to architect embedded computing for spacecraft and payloads — selecting processors/FPGAs, designing and bringing up hardware, and writing real-time firmware interfacing with sensors, lasers, and precision pointing systems.

NewBe an early applicant North AmericaPrincipal

Opto-Mechanical Engineer (Principal)

Ansys Assembly CAD Fea Prototyping +1 skills

Mantis Space is a venture-backed aerospace company pioneering breakthrough technologies to build the first energy infrastructure in space. Headquartered in New Mexico—the cornerstone of U.S. defense R&D and a…

NewBe an early applicant HybridNorth AmericaFull-time

Technical Recruiter (Castelion)

Candidate Experience Networking

Castelion was founded to restore America’s ability to field advanced weapons at speed and scale. Inspired by the engineering urgency of the WWII and Apollo eras, we combine rapid iteration, vertical integration, and…

NewBe an early applicant North AmericaFull-timeSenior

Senior Thermal & TPS Integration Engineer

NewBe an early applicant North America

Designs, analyzes, builds, and flight-validates thermal protection systems (heat shields, control-surface protection, internal insulation) for Castelion's long-range hypersonic strike vehicles, hands-on within multidisciplinary teams. Core work spans aerothermal analysis, high-temperature materials, ANSYS/MATLAB thermal-structural analysis, and high-temperature testing like arc-jet or furnace.

Physicist

Particle Labs USA We are an advanced technology company at the forefront of next-generation particle and accelerator science, building transformative solutions with real-world impact. Our founding team brings deep…