Curtis arrived at Bramall Lane in November 2023, having caught the eye of the Blades whilst at St Patrick's in League of Ireland.

The Navan born operator made his debut for United in the Premier League in the game against Everton at Goodison Park in May 2024.

The versatile right-sided player furthered his development in senior football during the 2024/25 campaign with loan spells at Peterborough United, followed by a stint in the SPL with St Johnstone, making 36 appearances between the two clubs.