| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 58.84 | 2024-01-21 | |
| 100m Breaststroke | 1:18.31 | 2017-03-03 | |
| 100m Butterfly | 59.76 | 2022-11-06 | |
| 100m Freestyle | 56.21 | 2018-12-08 | |
| 200m Backstroke | 2:12.84 | 2023-01-22 | |
| 200m Breaststroke | 2:53.43 | 2017-03-04 | |
| 200m Medley | 2:18.12 | 2018-12-09 | |
| 400m Medley | 5:28.29 | 2017-03-05 | |
| 50m Backstroke | 26.86 | 2024-01-21 | |
| 50m Breaststroke | 31.83 | 2022-11-06 | |
| 50m Butterfly | 25.95 | 2025-01-19 | |
| 50m Freestyle | 24.81 | 2018-12-07 |
Legault, Julien's top personal bests include 100m Backstroke (58.84), 100m Breaststroke (1:18.31), 100m Butterfly (59.76), 100m Freestyle (56.21), 200m Backstroke (2:12.84).
Legault, Julien swims for Brock University.