**Leyton Orient have signed goalkeeper Killian Cahill on a free transfer from Brighton & Hove Albion.**
The 21-year-old has agreed a two-year deal with the O's.
He has represented Brighton and the Republic of Ireland national team at U21 level.
Orient missed out on promotion to the Championship with [defeat by London rivals Charlton Athletic](/sport/football/live/cdd2257dmp8t) at Wembley in the League One play-off final.
"We needed to add a couple of goalkeepers to our squad with Josh Keeley and Sam Howes departing, and Killian will add real competition to that department," head coach Richie Wellens told the club's [website., external](https://www.leytonorient.com/news/2025/june/24/orient-complete-the-signing-of-goalkeeper-killian-cahill/)
"Killian is a long-term investment for the football club, and we are continuing with our recruitment process with the start of pre-season approaching us."