The strategic deal, which also includes a state-of-the-art integration and testing facility in Los Angeles, strengthens Quantum Space’s ability to provide highly manoeuvrable and cost-effective spacecraft platforms for national security, civil and commercial customers. The technology will support missions ranging from low-Earth orbit to geostationary orbit (GEO) and into cislunar space.
Quantum Space chief executive Kerry Wisnosky described the acquisition as a turning point for the company.
“Acquiring Phase Four’s multi-mode propulsion assets marks a major inflection point for Quantum Space,” Wisnosky said.
“It gives us the agility, resilience and efficiency required to serve the most demanding national security missions, support civil science objectives and meet commercial customers where they are headed. Mission areas such as Golden Dome, manoeuvrable GEO and life extension will all benefit – this is about providing unmatched space mobility.”
Phase Four’s technology expands the capabilities of Quantum’s Ranger spacecraft, offering rapid manoeuvring for responsive missions while enabling efficient station-keeping and orbital phasing. The system’s use of a single propellant simplifies refuelling, while its flexibility allows for faster response times, more varied mission profiles and longer operational lifespans.
The Los Angeles facility, located close to the US Space Systems Command, features a large high-bay integration hall, advanced environmental testing chambers, machine shops, clean rooms and a mission development laboratory. Quantum Space said the site will accelerate the expansion of its propulsion technologies and the Ranger fleet.
Phase Four chief executive Steve Kiser said the partnership would allow the company’s technology to reach its full potential.
“Phase Four has always set out to deliver propulsion systems that bridge the gap between traditional chemical performance and electric efficiency with our innovative radio frequency propulsion technology,” Kiser said.
“Partnering with Quantum Space ensures that this technology scales and finds its way into the missions that matter most – defence, science, commercial infrastructure. I’m proud of what the Phase Four team built, and Quantum Space is the right partner to get the multi-mode capability on orbit.”
Quantum Space said the acquisition positions it to deliver next-generation space services as demand grows for resilient, persistent orbital presence, with applications spanning defence operations, scientific research and commercial infrastructure.