LOCATION
Phase Four is an innovative company founded in 2015 by J. P. Sheehan and Simon Halpern, operating within the Aerospace and Defense industry. With around 44 employees as of 2025, Phase Four specializes in developing cutting-edge satellite propulsion systems primarily designed to advance the economics and flexibility of space missions. Their patented magnetic nozzle technology enables efficient small, low-mass plasma propulsion solutions that allow satellites to maneuver efficiently into a variety of orbits, including elliptical, geostationary, and polar. The official company website is https://phasefour.io.
Phase Four's corporate office footprint is steadily growing as they expand their operations in the fast-moving space technology market. The Phase Four headquarters address is located in Hawthorne, California, placing the company among several aerospace and space-tech leaders in the region. With a significant presence in Southern California, their HQ in Hawthorne anchors their advanced R&D and manufacturing, while an additional office in El Segundo supports operational and engineering functions. Phase Four's expansion strategy focuses on growth within key aerospace hubs, enhancing their capabilities to serve government and commercial clients worldwide.
The main Phase Four headquarters is situated at 12605 S Van Ness Ave, Hawthorne, CA 90250, United States. This facility is the hub of the company's engineering and manufacturing operations, housing R&D labs and production space for their plasma propulsion systems. The Hawthorne area, known for its rich aerospace heritage, provides proximity to top talent, suppliers, and clients in the space sector, reinforcing Phase Four HQ as pivotal to innovation and company growth.
Phase Four maintains an additional office in El Segundo, California, United States. This location is likely dedicated to expanding Phase Four's engineering, technical, and operational activities, leveraging El Segundo's reputation as another prime aerospace corridor in the Los Angeles area. El Segundo's proximity to large aerospace companies and airports offers logistical advantages and strengthens Phase Four's reach in the industry.
Websets is a powerful natural language search and data enrichment tool that helps you discover comprehensive office and headquarters information for any company. Whether you're researching Phase Four's global footprint or exploring office locations for other organizations, Websets provides detailed insights into headquarters addresses, office types, and geographic presence.
With Websets, you can access detailed office profiles, headquarters data, and location insights through intuitive natural language queries. Sign up now to enhance your office and headquarters research capabilities.