Dermot has represented Malta on numerous occasions, including at the 2002 Commonwealth Games in Manchester. He was the first Maltese athlete to qualify for the Ironman World Championships in Hawaii in 2013. He occupied the position of Malta National Triathlon Coach from 2003 till 2017 during which he headed the national team at the Glasgow Commonwealth Games in 2014 and the European Championships in Baku in 2015.
He was the winner of the ‘People’s Choice Award’ in 2014 and placed 2nd in the Sportsman of the year in 1998 whilst winning the first John Debattista Award as a promising youth athlete. Dermot won 10 National Triathlon titles, 7 Duathlon National Titles and 7 Triathlete of the year awards between 1998 and 2011.
In 2013 he was one of the founders of the Malta Youth Triathlon Academy.