Former United Launch Alliance CEO Tory Bruno in April 2015 as he announced the Vulcan Centaur rocket. (Image credit: United Launch Alliance)

After nearly 12 years leading the United Launch Alliance (ULA), its chief Tory Bruno is stepping down from the U.S. rocket launch provider to pursue "another opportunity," the company announced this week.

What's that new opportunity? We're not sure yet, but it's guaranteed to be "Something interesting," Bruno wrote on social media after the Dec. 22 announcement.

During Bruno's term, ULA fought to contend with launch competitor SpaceX, which successfully landed a Falcon 9 booster for the first time in 2015 to lower costs through reusability. SpaceX now regularly launches and lands Falcon 9 rockets and has flown over 160 times this year. ULA eventually hopes to recover and reuse only part of the Vulcan rocket, its BE-4 first stage engines built by Blue Origin.

"It has been a great privilege to lead ULA through its transformation and to bring Vulcan into service. My work here is now complete and I will be cheering ULA on," Bruno wrote on X.

"Finished the mission I came to do," he added. "Great people. Great rocket. New things coming."

In a statement, Robert Lightfoot and Kay Sears, the ULA board chairs for Lockheed Martin and Boeing, respectively, thanked Bruno for over a decade of service.

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"We are grateful for Tory’s service to ULA and the country, and we thank him for his leadership," Lightfoot and Sears wrote in the statement.

ULA's board has appointed Boeing veteran John Elbon as interim CEO as the search for a new leader begins.

"We have the greatest confidence in John to continue strengthening ULA’s momentum while the board proceeds with finding the next leader of ULA," Lihtfoot and Sears wrote.

Tariq is the award-winning Editor-in-Chief of Space.com and joined the team in 2001. He covers human spaceflight, as well as skywatching and entertainment. He became Space.com's Editor-in-Chief in 2019. Before joining Space.com, Tariq was a staff reporter for The Los Angeles Times covering education and city beats in La Habra, Fullerton and Huntington Beach. He's a recipient of the for excellence in space reporting and the from the National Space Society. He is an Eagle Scout and Space Camp alum with journalism degrees from the USC and NYU. You can find Tariq at Space.com and as the co-host to the on the . To see his latest project, you can follow Tariq on Twitter .