[2] He was accredited to first-division games in North America in 2012 and has been FIFA referee since 2015, only one of three Canadians at the time.

[1] On June 23, 2017, it was announced that Fischer had been appointed to officiate in the 2017 CONCACAF Gold Cup.

[6] He was also appointed to be a Video Assistant Referee for the 2019 FIFA Women's World Cup in France.

In 2019 the Canadian Premier League began play and Fischer was one of the referees appointed during the inaugural season.

[1] Fischer has been involved in numerous high-profile tournaments and matches including:[7] On May 19, 2022, Fischer was announced as one of 24 Video Match Officials appointed by FIFA for the 2022 FIFA World Cup Qatar 2022 [17]