Starting in 1998, Thomaidis began coaching women's basketball at the
University of Saskatchewan. Throughout her career as coach for the
Saskatchewan Huskies, she led the team to multiple
Canada West titles, with their first championship win in 2006. In 2025-26, she coached the team to their second-ever perfect regular season in program history. Outside the University of Saskatchewan, Thomaidis was an assistant coach for Canada women's national basketball team from 2002 to 2013, which included a quarter final performance at the
2012 Summer Olympics.
Head coach In 2013, she replaced
Allison McNeill as head coach and her team won silver at the
2013 FIBA Americas Championship for Women. Following her promotion, Thomaidis led Canada's women's basketball team to a fifth-place finish at the
2014 FIBA World Championship for Women and a gold medal at the
2015 Pan American Games. Thomaidis's team came in seventh at the
2016 Summer Olympics and won a gold medal at the
2017 FIBA Women's AmeriCup. In April 2023, she was appointed head coach of the
German women's national team. On October 10, 2025, it was announced that she was no longer head coach of Germany, departing the role in order to focus on coaching at the University of Saskatchewan. In February 2026, Thomaidis was named the Canada West women’s basketball coach of the year for the third season in a row, following a season in which the Huskies maintained an unbeaten regular season and achieved a winning streak of 51 games. She coached the Huskies to a second consecutive Bronze Baby following a 77-68 win over the
UNB Reds in the final on March 8, 2026. ==Awards and honours==