Millennium Space Systems

Millennium Space Systems, Inc. is a US-based satellite manufacturer headquartered in El Segundo, California, specializing in small and medium-class satellites for government and defense programs. Founded in 2001 and acquired by Boeing in 2018, the company builds responsive space systems — satellites designed to be manufactured, tested, and launched quickly to meet urgent national security needs. Millennium Space Systems developed and operates the Aquila satellite constellation for the US Space Development Agency (SDA) — a proliferated LEO (pLEO) constellation providing persistent space domain awareness and tactical communications for the US Department of Defense. The company's Aquila spacecraft represent the first generation of SDA's National Defense Space Architecture (NDSA) transport layer satellites. Millennium leverages Boeing's global supply chain and engineering resources while maintaining the agility of a small company focused on responsive, affordable space systems.