Castelion Headquarters & Office Locations

Date August 18, 2025
C

Castelion

LOCATION

737 Lairport Street, El Segundo, California, United States

Castelion Corporation Headquarters and Office Locations

Castelion Corporation, established in 2022 by Bryon Hargis, Sean Pitt, and Andrew Kreitz, is an innovative defense and aerospace company that has quickly made a mark within the industry. Operating out of California, Castelion specializes in the rapid development and scalable manufacturing of cutting-edge hypersonic strike systems, designed to enhance national security through advanced, affordable, high-performance technologies. The company, employing approximately 50 talented individuals, focuses on enabling the United States and its allies to stay ahead of evolving defense threats by leveraging modern production capabilities.

Castelion Corporation’s office footprint is strategically crafted to support its ambitious mission. The company’s primary headquarters is located in El Segundo, California—a hub for aerospace innovation—while additional facilities support both core and specialized operations. Notably, its expansive new headquarters in Torrance serves as the main center for design, engineering, testing, and manufacturing. Castelion’s Midland, Texas site further supports advanced rocket engine and propulsion testing, underlining the company’s commitment to rapid R&D and full-cycle production. This combination of targeted office locations ensures Castelion hq can drive agile innovation and maintain operational excellence.

Office Locations

Headquarters

Address: 737 Lairport Street, El Segundo, California, United States
Castelion Corporation headquarters sits in El Segundo—an epicenter for the aerospace and defense sector. Situated close to Los Angeles International Airport, the Castelion headquarters address offers direct access to key industry partners and government agencies. The El Segundo facility consolidates company leadership, engineering innovation, and business strategy under one roof, serving as the nerve center for all major strategic initiatives. The presence of the Castelion corporate office in El Segundo highlights the company’s integration within the historic aerospace cluster of Southern California.

Torrance, California – Primary HQ and Engineering Campus

Address: 19951 Mariner Ave, Torrance, CA, 90503-1672, United States
This newly established 90,000 square-foot headquarters and engineering campus in Torrance is Castelion Corporation’s largest operational site. The facility hosts core activities in design, testing, and manufacturing, positioning Castelion to rapidly prototype and scale next-generation military systems. Its size and capabilities reflect a significant expansion in Castelion’s ability to deliver advanced products and meet growing defense demand.

Midland, Texas – Test Facility

Located just outside the city limits on land leased from the Midland Development Corporation, this facility operates as the main testing ground for rocket engines and propulsion systems. The Midland site enhances Castelion’s in-house test capabilities, supporting the Castellion hq in California by enabling parallel development and qualification of critical hypersonic technologies. Its geographic separation also ensures compliance with safety standards and efficient logistics for advanced testing programs.

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