She represented Ireland at Under 25 level (as Paula Smith) from 1991 to 1996, gaining 18 junior international caps.

[1] Montgomery has also represented Ireland at various international events including the Atlantic Bowls Championships in Llandrindod Wells, Wales (1997) and Paphos, Cyprus (2011) where she won the fours bronze medal.

[2] In 2012, she represented Ireland at the 2012 World Outdoor Bowls Championship in Adelaide, Australia competing in the pairs and the fours events.

At national level she won the 2002 and 2009 pairs titles and 2001 triples title at the Irish National Bowls Championships and subsequently won two British Isles Bowls Championships triples in the 2002 and pairs in 2010.

Montgomery was assistant manager to the Under 25 Women's Irish International team in 2014 and has been part of the coaching and selection committee since then.