Maggs played for Ireland because Brian Ashton, who was Ireland coach at time, came to Bristol to watch flanker David Corkery and was told by Ralph Knibbs (Bristol's player–manager), that Maggs had a grandfather from Limerick.[1] He was then called up to the Irish development tour to New Zealand in 1997.[2] He made his international debut for Ireland against New Zealand at Lansdowne Road in November 1997 and played at the 1999 and 2003 Rugby World Cups.