President Obama will formally nominate assistant U.S. Attorney General Thomas E. Perez as the next labor secretary on Monday, White House officials said, marking the first Latino selection to Obama’s second-term Cabinet.

Perez, 51, a first-generation Dominican American, is a former Montgomery County Council member who has overseen the civil rights division in the Justice Department since 2009. If confirmed, he would replace Hilda Solis, who resigned in January. The Washington Post reported last week that Perez’s nomination was expected, according to two sources familiar with Obama’s plans.