Cieran Peter Slicker (born 15 September 2002) is a professional footballer who plays as a goalkeeper for Premier League club Ipswich Town.

[3] He made his professional debut for the club's under-21 team in an EFL Trophy draw against Lincoln City on 17 November 2020.

[4] On 15 November 2021, Slicker was named as a substitute for the first team in a 6–3 victory over RB Leipzig in the UEFA Champions League.

[6] In July 2022 Slicker signed for EFL League Two side Rochdale on loan for the 2022–23 season.

[7] He made his Rochdale debut on 9 August 2022 in the club's 2–0 victory over Burton Albion in the EFL Cup.