Boeing’s head of defense, space and security is leaving after 15 years

Colbert and Boeing representatives did not immediately respond to Business Insider’s requests for comment.

“At this critical time, our priority is to restore our customers’ trust and meet the high standards they expect from us to enable their critical missions around the world,” CNBC reported Ortberg wrote in the note. “Working together, we can and will improve our performance and ensure we deliver on our commitments.”

Colbert’s departure comes amid significant turmoil at the company. He is the first executive to leave the company since Ortberg became CEO. It is unclear what led to his departure.

Boeing’s defense, space and security division has had budget overruns in developing its next-generation tanker for the US Air Force, according to Defense News, and has had recent problems with its Starliner spacecraft.

Earlier this month, the Starliner returned to Earth without incident, but also without the NASA astronauts who piloted it to the International Space Station. NASA announced last month that astronauts will remains on the space station and will return on a SpaceX ship in February 2024 due to concerns about propellant problems and a helium leak with the Starliner.

The aerospace company’s stock has fallen more than 39% since January 1.