The Nationals front office is going to have a new — and relatively younger — look.

Washington hired Red Sox senior vice president/assistant general manager Paul Toboni as their new head of baseball operations, The Post’s Joel Sherman confirmed.

ESPN’s Jeff Passan first broke the news.

The Nationals now have the foundation for a revamped front office after they fired longtime general manager Mike Rizzo — and manager Davey Martinez — in July.

The Boston Globe’s Tim Healey reported last week that Toboni was under consideration to become the Red Sox general manager and work directly as chief baseball officer Craig Breslow’s No. 2.

Instead, after 10 years in the Red Sox organization and various roles from intern to scout to assistant GM, Toboni now inherits a Nationals team that has floundered since winning the World Series in 2019.

Since winning it all in a Cinderella run, Washington has not had a single winning season and is playing out its fifth straight year with 90-plus losses.

The Nationals do have three top-100 prospects on MLB Pipeline — shortstop Eli Willits and right-handers Jarlin Susana and Travis Sykora — and their farm system as a whole ranks near the bottom in a number of lists, sitting at No. 23 on MLB.com and getting a C- grade for the year on Baseball America.

Toboni was part of a front office in Boston that helped turn around that minor league system and has already seen former top-100 prospects Roman Anthony, Kristian Campbell, Marcelo Mayer and Payton Tolle make their big league debuts this year.

Toboni will have his work cut out for him, especially now working in the same division with heavy spenders in the Mets and Phillies.