Sean started his youth career at Belvedere before joining Fulham’s academy in 2011. He made his senior debut at left-back against Wolves at Craven Cottage in August 2014. Two months later Sean scored his first goal for Fulham in the 1-0 win over Norwich.

Caretaker manager Kit Symons began playing the Ireland youth international in midfield but a serious injury interrupted his season. Altogether Sean made 27 appearances for the Championship club with loans spells at Mansfield Town (2015-16) and Hartlepool (2016-17). 

He signed for the Hoops in February 2018.

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