As part of the contract, Sodexo will also sell conference and event facilities at the Windsor Park venue through Sodexo Prestige Venues & Events.
Last year the stadium, the home of the Northern Ireland football team, was redeveloped and enlarged to more than 18,000 seats.
The venue, which will host the team's 2018 World Cup qualification fixtures, now also boasts four function suites overlooking the pitch, 10 executive boxes, a museum, press room and players' lounge.
Chris Bray, CEO Sports & Leisure Sodexo UK & Ireland, said: “We are delighted to announce this partnership with the Irish Football Association at Windsor Park. The new stadium development gives us an opportunity to deliver a fantastic experience for match-goers, and host a wide range of conferences and events on non-matchdays.
“At our other stadiums we have strong relationships with the local community, and the National Football Stadium at Windsor Park is no exception. We are already working with three Belfast suppliers: Keenan Seafood, Arnotts Fruit and the French Village Bakery. We look forward to bringing fresh, innovative, responsibly-sourced local produce to stadium visitors.”
Louise Doyle, stadium director, said: “We are very pleased to be working in partnership with Sodexo Sports & Leisure to provide excellent standards of service and catering to the National Football Stadium at Windsor Park.
“Sodexo will allow the venue not only to offer a high standard of food, refreshments and a variety options in our public concourses but also the superb and innovative hospitality in our outstanding and unique corporate areas, all with a view of the iconic pitch."