Pete Buttigieg won Senate approval Tuesday as transportation secretary, the first openly gay person to be confirmed to a Cabinet post. He’ll be tasked with advancing President Joe Biden’s ambitious agenda of rebuilding the nation’s infrastructure and fighting climate change.

Buttigieg, a 39-year-old former mayor of South Bend, Indiana, and Biden’s one-time rival during the Democratic presidential primaries, was approved on a 86-13 vote.

“I’m honored and humbled by today’s vote in the Senate—and ready to get to work,” Buttigieg tweeted shortly after he was confirmed.