Oliver is a middle and long-distance runner currently studying International Business at Oklahoma State University in the United States, where he competes for the university's track and cross-country programme.

Oliver first made his mark internationally at the 2022 European U18 Championships in Jerusalem, reaching the final of the 2000m steeplechase. He has also represented Scotland on multiple occasions across cross country and track, establishing himself as a versatile athlete capable of competing over a range of distances.

In 2024, Oliver won the London Mini Marathon, adding to his growing list of achievements. He continued to make significant progress after joining Oklahoma State, setting a Scottish U20 indoor mile record of 4:02.65 in 2025. During the 2026 indoor season, he broke the four-minute barrier for the mile, improving his personal best to 3:58.58 and earning All-Big 12 honours as part of Oklahoma State's distance medley relay team.

Oliver continued his progression outdoors in 2026, recording a new 1500m personal best of 3:38.11, finishing 9th in the event at the Big 12 Championships and qualifying for the NCAA West First Round. With personal bests across distances from 800m to 5000m, Oliver continues to develop his potential on the American collegiate circuit while representing his Scottish and British running background internationally.