David Michaels, who as deputy secretary of the Department of Labor (DOL), presided over the Occupational Safety and Health Administration (OSHA), spent his last day in office today before returning to teach at George Washington University on Jan. 17.

Michaels spent his final day presiding over a meeting to formulate a new regulation to prevent violence in the health care industry. Jordan Barab will assume his duties until the incoming Trump administration installs a new chief.