Post-pandemic remote work has become all the hype. People believe themselves to be more productive, their life gets more flexible and it drastically reduces commute time.

The CEO of IBM, Arvind Krishna, however, tells his 260,000 staff: “Remote work can be hazardous to your career.” While he’s not forcing any staffers to come into the office, those who don’t would be hard-pressed to get promoted into managerial roles.

“Being a people manager when you’re remote is just tough because if you’re managing people, you need to be able to see them once in a while,” he said in an interview on Monday in New York.