[3] In 2012, he participated in the UCI Para-cycling Track World Championships in Los Angeles, where he finished first in the C3 3 km individual pursuit.

[5][9] In the lead up to the 2012 London Paralympics, he participated in the Blenheim Palace festival of cycling time trial event.

[13] Competing at the 2013 Para-cycling Road World Championships, Baie-Comeau, Canada, he won a gold medal in the Men's Individual Time Trial C3.

[14] At the 2014 UCI Para-cycling Track World Championships in Aguascalientes, Mexico, he won a bronze medal in the Men's 3 km Individual Pursuit C3.

[21] At the 2018 UCI Para-cycling Track World Championships in Rio de Janeiro, Brazil, Nicholas won the gold medal in the Men's 3 km Individual Pursuit C3.

At the 2022 UCI Para-cycling Track World Championships in Saint-Quentin-en-Yvelines, France, he won the bronze medal in Men's Omnium C4.

[29] At the 2024 UCI Para-cycling Track World Championships in Rio de Janeiro, Brazil, he finished fourth in both the Men's Time Trial and Individual Pursuit C3 events.