Denver-based Voyager Technologies announced it acquired ExoTerra Resource on Monday for an undisclosed price, the company said in a news release.

The acquisition would bring together two companies within the metro Denver region, which is a major hub for the aerospace industry.

Voyager is a growing aerospace company that’s working on defense and commercial aerospace projects. It’s also behind Starlab, the private space station aiming to become a replacement for the International Space Station once the ISS retires.

ExoTerra Resource is a satellite technology company founded in 2011 out of Littleton.

Voyager’s CEO and Chairman Dylan Taylor said the purchase of the company that specializes in electric propulsion systems will help Voyager in the defense and commercial markets. It also said it will better position the company in winning contracts for the “Golden Dome” project.

“As freedom of maneuver becomes central to space control and deterrence, it’s imperative that reliable propulsion systems are built, tested and qualified right here in the United States,” Taylor said.

Voyager said it was interested in ExoTerra’s proprietary technology for precise spacecraft maneuvering and longer lifetimes that are becoming more important in the national defense’s aerospace arsenal to have an advantage.

ExoTerra has technology on DARPA’s Blackjack ACES spacecraft and supplied Denver-based York Space Systems with 21 propulsion modules for the Space Development Agency Transport Layer.

“We’ve spent years developing efficient, compact and reliable electric propulsion systems, and joining forces with Voyager allows us to enhance and deliver these systems at scale,” said Mike VanWoerkom, CEO of ExoTerra, in a news release. “Together, we’ll manufacture flight-proven propulsion technologies that fortify the nation’s ability to manufacture and field spacecraft with speed, resilience and cost efficiency.”