[3] He attended Killarney Heights High School and is studying a Bachelor of Laws at Macquarie University.

Cotie first represented Australia in 2014 at the BISFed World Open in Hong Kong, where he and Daniel Michel won the silver medal in the mixed pairs BC3.

In 2017, he won the bronze medal in the mixed singles BC3 at the 2017 BISFed Regional Open Championships in Dubai, UAE.

[2] Cotie and Michel won the silver medal in the mixed pairs BC3 at the 2018 BISFed World Boccia Championships in Liverpool, England.

He teamed with Daniel Michel and Jamieson Leeson in the Mixed Pairs BC3, where they won 2 and lost 2 matches but failed to qualify for the quarter-finals.