Elon Musk and his rocket company, SpaceX, have repeatedly failed to comply with federal reporting protocols aimed at protecting state secrets, including by not providing some details of his meetings with foreign leaders, according to people with knowledge of the company and internal documents.

Concerns about the reporting practices — and particularly about Musk, who is SpaceX’s CEO — have triggered at least three federal reviews, eight people with knowledge of the efforts said. The Defense Department’s Office of Inspector General opened a review into the matter this year, and the Air Force and the Pentagon’s Office of the Under Secretary of Defense for Intelligence and Security separately initiated reviews last month.

The Air Force also recently denied Musk a high-level security access, citing potential security risks associated with the billionaire.

SpaceX was awarded at least $10 billion in federal contracts with the Pentagon and NASA from 2019 to 2023, making it a major contractor. For years, SpaceX workers responsible for upholding disclosure rules grudgingly allowed Musk to disregard many of the reporting procedures, as they did not want to lose their jobs, the people with knowledge of the company said.

But the issue has reached a tipping point, as Musk’s influence is set to escalate. An ardent supporter of President-elect Donald Trump, he was named last month to help lead an effort to winnow the federal bureaucracy and has joined calls that Trump has held with foreign leaders.

Some SpaceX workers have become concerned about Musk’s ability to handle sensitive information, especially as he posts openly on X about everything from video games to diplomatic meetings, the people said. The fears have been compounded because Musk has a top secret security clearance at SpaceX, which makes him privy to classified material such as advanced U.S. military technology.

Under security clearance rules, Musk must report information about his private life and foreign travel, among other details, to the Defense Department as part of a process known as “continuous vetting.” But since at least 2021, Musk and SpaceX have not adhered to those reporting requirements, the people with knowledge of SpaceX said.

Whether the federal reviews will affect Musk or SpaceX is unclear. Some of the SpaceX employees who complained about the privately held company’s reporting practices have been fired or forced out, the people with knowledge of the rocket maker said.