He competed in the men's 4 × 100 metre freestyle relay event at the 2017 World Aquatics Championships.

[2][3] In April 2022, at the 2022 South Africa National Swimming Championships, Jimmie won the bronze medal in the 50 metre freestyle with a time of 22.82 seconds, achieved a qualifying time for the 2022 World Aquatics Championships in the event and was named to the South Africa roster in the event for the 2022 World Championships.

[4][5] On day five of the World Championships, held at Danube Arena in Budapest, Hungary, he placed 55th in the 100 metre freestyle with a time of 50.68 seconds.

[8] At the 2022 Commonwealth Games, held in Birmingham, England in July and August, Jimmie qualified for the semifinals of the 50 metre butterfly ranking 16th with a time of 24.17 seconds in the preliminaries.

[13] Day five of competition at the 2022 Commonwealth Games, Jimmie ranked fourteenth in the preliminaries of the 50 metre freestyle with a time of 22.98 seconds, qualifying for the semifinals.