James Pantemis

FC Montreal

In 2016 Pantemis joined FC Montreal, the second team of the Montreal Impact in the USL. He made his professional debut on May 2, 2016, in a 1–0 defeat to Orlando City II, and also featured in a 2–1 defeat to Bethlehem Steel on May 15, 2016. He played two games for FC Montreal after tearing his LCL in June 2016, and was still injured when the club ceased operations after the 2016 season, leaving him unattached.

Montreal Impact / CF Montréal

After recovering from his LCL injury, Pantemis trained with Serie A club Bologna in September 2017, before signing a first team contract with the Montreal Impact in November 2017. He made his competitive debut for the Impact on July 24, 2019, in a Canadian Championship match against York9 with the Impact winning 1-0. On March 6, 2020, Pantemis was sent on loan to Canadian Premier League side Valour FC, reuniting with his former Canada U20 coach Rob Gale. He made his debut for Valour on August 16 against Cavalry FC. After the 2022 MLS season, where Pantemis split starting duties with Sebastian Breza, his option was initially declined by CF Montréal. Pantemis then signed new one-year deal with the club, with an options for 2024 and 2025. At the end of the 2023, CF Montréal declined his option for 2024, ending his time with the club.

Portland Timbers

In January 2024, Pantemis signed with the Portland Timbers.

Youth

Pantemis was a part of Canada's U-20 program and made his start in a 2–1 victory over England. In May 2018, Pantemis was named to Canada's under-21 squad for the 2018 Toulon Tournament. In February 2020 Pantemis was named to the provisional roster for the Canadian U-23 team ahead of the 2020 CONCACAF Men's Olympic Qualifying Championship. He was named to the final squad on March 10, 2021.

Senior

In June 2017, he was called up to the Canadian senior national team for a friendly against Curaçao, but did not appear. He was subsequently called up for a friendly against Jamaica in September of that year. In November 2022, Pantemis was named to Canada's squad for the 2022 FIFA World Cup. In January 2026, he was called up to Canada for a training camp and friendly against Guatemala, which he started, however, as it was designated a B-level friendly, it did not count as an official senior cap.

Pantemis started playing soccer for AS Pierrefonds at the age of four and later played for Lakeshore SC before joining the Montreal Impact Academy in 2014.

Pantemis was born in Canada and is of Greek descent. He holds a Greek passport.