Nimick was born in Happy Valley-Goose Bay, Newfoundland and Labrador in Canada,[1] to an English mother and an Irish/Northern Irish father, where his father who was part of the Royal Air Force and was posted at CFB Goose Bay.

[3] In 2019, Nimick moved to the United States to attend Western Michigan University, where he played for the men's soccer team.

[4] On November 15, 2019, he scored his first collegiate goal in the team's Mid-American Conference Championship semifinal loss against the West Virginia Mountaineers.

[28][29] On June 30, he scored his first goal, netting a penalty kick during stoppage time to give the Wanderers a 2–1 victory over Forge FC.

[30][31][32] After scoring his fourth goal of the season on August 26, he was named the CPL Player of the Week.

[39][40] On July 18, 2024, he scored two penalties, before being denied another one by Jonathan Viscosi, in a 3–1 league victory over Valour FC.