Sean was born in Kristiansund Norway which where his mother hailed from. His father Terence is a native of Mountcharles and this resulted in Sean spending a brief spell with Eany Celtic in the South Division. He spent most of his schoolboy career though with IK Vag before signing for Arsenal aged 16 in 2008. Sean decided to declare for the Republic of Ireland and was first choice goalkeeper for the U-17 side and later at U-19 and U-21 level. He went on loan to Leeds United in 2010 but returned to Norway in 2012. Following spells with Sandnes Ulf, Start and Ullensaker/Kiss he is currently playing with the local side Kristiansund.