Irish-born Ian Costello, who joined Dai Young’s coaching team at the start of the 2018/19 season, has responsibility for defence.
Prior to joining the Black and Golds, Costello spent two seasons as Head Coach at Championship club Nottingham Rugby.
From 2011 to 2016, Costello was part of Munster Rugby’s coaching set-up, working initially as Skills Coach then as Assistant Coach with responsibility for defence and kicking.
Before making the move into the Thomond Park club’s Pro 12 and Champions Cup set-up, Costello worked with their academy and Under 20 squads.
During this period he was Head Coach of the Munster A side that lifted the British & Irish Cup title in 2011.
Costello, who also has experience as Director of Rugby at amateur side UL Bohemians, was a fly-half or centre in his playing days.