Elon Musk’s unceasing attempts to access the data and information systems of the federal government range so widely, and are so unprecedented and unpredictable, that government computing experts believe the effort has spun out of control. This week, we spoke with four federal-government IT professionals—all experienced contractors and civil servants who have built, modified, or maintained the kind of technological infrastructure that Musk’s inexperienced employees at his newly created Department of Government Efficiency are attempting to access. In our conversations, each expert was unequivocal: They are terrified and struggling to articulate the scale of the crisis …

Based on what has been reported, DOGE representatives have obtained or requested access to certain systems at the U.S. Treasury, the Department of Health and Human Services, the Office of Personnel Management, and the National Oceanic and Atmospheric Administration, with eyes toward others, including the Federal Aviation Administration. “This is the largest data breach and the largest IT security breach in our country’s history—at least that’s publicly known,” one contractor who has worked on classified information-security systems at numerous government agencies told us this week. “You can’t un-ring this bell.”

The Atlantic