Jessica Judd gained her first international experience in 2011 at the World Youth Championships near Lille , where she won the bronze medal in the 800-meter run in 2: 03.43 minutes . In the following year she won the silver medal over 800 meters behind the American Ajeé Wilson at the Junior World Championships in Barcelona in 2: 00.96 minutes and finished fifth over 1500 meters in 4: 09.93 minutes. In 2013 she qualified over 800 meters for the World Championships in Moscow , where she was eliminated with 2: 01.48 min in the first round. 2014 she took for England at the Commonwealth Games inGlasgow took part and finished fourth in 2: 01.91 min. Then she reached seventh place at the European Championships in Zurich in 2: 01.65 minutes. In 2017 she took part in the 1500 meter run at the World Championships in London , where she reached the semi-finals with a new personal best over 1500 meters and was eliminated there with 4: 10.14 minutes. Shortly afterwards she won the bronze medal over 5000 meters in 15: 51.19 minutes at the Summer Universiade in Taipei behind the Germans Hanna Klein and Jessica O'Connell from Canada.
In 2018 she took part in the Commonwealth Games in the Australian Gold Coast for the first time and finished 14th over 1500 meters in 4: 08.82 min. The following year, she won the Student World Games in Naples in 15: 45.82 minutes in the 5000 meter run .