Elon Musk has shared his own disbelief that the government efficiency department Donald Trump tapped him to lead “is real.” The world’s richest man and SpaceX owner, who holds billions of dollars in government contracts through his companies, appeared to mock the newly-created Department of Government Efficiency (DOGE) in a post on X.

The role is not certain but likely, Axios reports. The appointee would be responsible for keeping America's AI edge and improving government efficiency, among other tasks.