Skip to content

Flight Test Engineer

Torrance, California, United States
Full Time On-site

Summary

Job Description

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.

Responsibilities

  • Develop, coordinate and execute test procedures and instrumentation/test setup diagrams for flight tests.
  • Support hardware integration of avionics, telemetry, propulsion, and flight control systems into flight test articles and ground test setups (vehicle/hardware in the loop).
  • Oversee pre-flight integration, ground control setup, instrumentation setup, and configuration control of test articles.
  • Participate in flight readiness reviews, test planning meetings and technical interchange sessions with internal and government stakeholders.
  • Ensure proper documentation of test anomalies, root cause investigations, and corrective action implementation.
  • Support real-time mission control operations, including monitoring and troubleshooting telemetry data streams.

Basic Qualifications

  • Bachelors degree in Aerospace, Mechanical, Electrical Engineering (or related field).
  • 2+ years of relevant experience in missile, rocket, or flight vehicle testing.
  • Hands-on experience with flight test instrumentation, telemetry systems, and ground control stations.
  • Hands-on experience with operation of ground support equipment (electrical, hydraulic and/or pneumatic).
  • Exceptional attention to detail with clear written and verbal communication skills.
  • Proven ability to operate in a fast-paced, multidisciplinary test environment.
  • Ability to travel domestically up to 50 percent of time.
  • Active U.S. Secret (or higher) security clearance or eligibility to obtain one.

Preferred Skills and Experience

  • Experience interfacing with U.S. DoD customers and government flight test organizations.
  • Familiarity with MIL-STD-1553, Ethernet, and serial (CAN) communication protocols.
  • Experience with command-line interface in a Linux environment.
  • Experience with troubleshooting RF systems using equipment such as a spectrum analyzer.
  • Experience with troubleshooting ground support equipment (electrical, hydraulic, and/or pneumatic).
  • Experience with troubleshooting and repair of electrical harnesses and cabling.
  • Experience with data reduction scripting tools such as MATLAB or Python.

Leadership Qualities

Bias to Action and Creative Problem Solving. Desire and experience questioning assumptions in ways that lead to break through ideas that are ultimately implemented. Successfully bring in applicable processes/concepts/materials from other industries to achieve efficiency gains. Ability to personally resolve minor issues in development without requiring significant support.

High Commitment, High Initiative. A successful candidate will have a genuine passion for Castelion's mission and consistently look for ways to contribute to the company's technical goals and prevent hardware blockers. Ability to work in a fast paced, autonomously driven, and demanding atmosphere. Strong sense of accountability and integrity.

Clear Communicator. Proactively communicates blockers. Trusted in previous roles to be voice of company with regulators, suppliers, gate keepers and customers. Capable of tactfully managing relationships with stakeholders to achieve company-desired outcomes without compromising relationships. Emails, IMs and verbal interactions are logical, drive clarity, and detailed enough to eliminate ambiguity.

About Castelion

Castelion

Castelion is one of the fastest-rising defense technology companies focused on building affordable, rapidly deployable hypersonic strike systems for the U.S. military. Founded by former SpaceX leaders, the company is working to modernize how advanced weapons are developed and manufactured—using rapid iteration, vertical integration, and scalable production to deliver next-generation deterrence capabilities faster than traditional defense programs. Castelion’s mission centers on restoring America’s ability to field advanced military technology at speed and scale.

For job seekers, Castelion offers the opportunity to work directly on some of the most advanced technologies in national defense, including propulsion systems, avionics, flight software, guidance and navigation, missile systems, and advanced manufacturing. The company hires across aerospace engineering, embedded software, manufacturing, test engineering, avionics, cybersecurity, and operations—making it especially attractive to engineers, builders, veterans, and mission-driven professionals who want hands-on ownership of real hardware.

Unlike traditional defense contractors, Castelion operates with a startup-style engineering culture modeled after rapid aerospace development environments. Employees work closely with flight hardware, testing, and production systems in a fast-paced setting where speed, accountability, and execution are prioritized. The company openly emphasizes a builder mentality—giving team members the chance to own major projects and contribute directly to systems with national security impact.

As the U.S. military increases investment in hypersonic weapons, missile modernization, and scalable deterrence capabilities, Castelion continues to grow rapidly through major government contracts and manufacturing expansion. For professionals seeking a high-growth aerospace and defense company where they can help shape the future of national security technology, Castelion is quickly becoming one of the most exciting employers in the defense innovation ecosystem.

Go to company profile