Martin Joseph Walsh is an American politician and union official. He has been the 29th United States secretary of labor since March 23, 2021. A Democrat, he previously served as the 54th mayor of Boston from 2014, until resigning in 2021 after being confirmed by the United States Senate to serve as secretary of labor in the cabinet of President Joe Biden. Before his mayoralty, he served as a member of the Massachusetts House of Representatives, representing the 13th Suffolk district from 1997 until 2014.