By CBSBoston.com Staff

BOSTON (CBS) – Former Boston Mayor Marty Walsh has been sworn in as the next Labor Secretary. He was sworn in by Vice President Kamala Harris Tuesday evening in the Eisenhower Executive Office Building.

Walsh left Boston early Tuesday morning, arriving at Logan Airport carrying a coffee from Doughboy Donuts in South Boston. Walsh gave a plug to the shop during his confirmation hearing last month.

“It’s bittersweet, being mayor was an incredible job, loved it. It was a little emotional this morning, but I’m looking forward to my new challenge,” he told reporters before boarding his flight.

Walsh tweeted a “thank you” to the city Tuesday morning, saying, “Boston is more than my hometown. It’s my heart, and serving you for the last seven years has been the honor of my life. That’s why I want to say thank you — for everything.”

Walsh was confirmed by the Senate Monday evening and then officially resigned from office at 9 p.m. City Council President Kim Janey became acting mayor and the city’s first woman and first person of color to hold the office.

Walsh is the first union member to be Secretary of Labor in nearly 50 years.

CBSBoston.com Staff