The Netherlands Under-21 international becomes the Black Cats' eighth summer signing, coming after the announcement of Granit Xhaka’s arrival in midweek. 

Roefs, who has signed a five-year deal, had a breakthrough season in the Eredivisie, making 32 appearances and recording 10 clean sheets.

His excellent form was instrumental in NEC’s eighth-place finish, securing its qualification for the 2025-2026 UEFA Conference League.

Having earned 10 caps for Netherlands Under-21s, including five appearances at this summer's European championships, where Jong Oranje reached the semi-finals, Roefs boasts international pedigree.

He will be seeking to knock the Black Cats’ number one and EFL Championship play-off final hero, Anthony Patterson, off his perch. Roefs ranked fifth for the most goals prevented in Europe's top six leagues last season.

Roefs said: "Signing for Sunderland feels fantastic. Joining a club with such a rich history is a proud moment, and I’m eager for the challenge in the Premier League.

"Last season was my first full senior campaign, and I’m pleased with how it went, especially my stats. Being part of Sunderland’s journey is very special, and I’m looking forward to the season ahead."

Roefs could make his debut against Real Betis in a pre-season friendly at The Stadium of Light this weekend, should he receive international clearance.