Making his international debut in Peru, he finished 7th, with his best throwing standing at 61.77 m. In August, he competed at the Canadian U18 Championships in Brandon, Manitoba, winning gold in the hammer and earned a bronze medal in the discus.

The following year, he improved upon his 2017 performances at the BC High School Championships in the hammer and discus throws, taking first in both events.

After graduating from Sardis Secondary in 2018, Hamilton enrolled at the University of British Columbia to compete for the UBC Thunderbirds track and field.

There he earned a bronze medal, just edging out fellow Canadian Adam Keenan for a spot on the podium by just 12 centimeters with a throw of 74.36 m to Keenan's 74.24 m. On 24 May 2023, Hamilton defended his NAIA title in Marion, Indiana with a throw of 71.97 m. His next competition came a month later in Rathdrum, Idaho where he managed a personal best of 76.80 m. At the Canadian Championships, he threw a mark of 72.81 m, placing second to Ethan Katzberg.

That performance qualified him for the 2024 NCAA Division I Indoor Track and Field Championships in Boston, becoming the first Cal male thrower to do so.