Oliver Rasmussen

Rasmussen started his single-seater career off with Jenzer Motorsport at the opening round of the 2018 Italian F4 Championship. Rasmussen completed the first ten races with 4 retirements and a best finish of 11th, a string of 3 retirements in a row starting at Monza's 2nd race left Rasmussen the only one of the 6 Jenzer drivers without a point. In race 2 at the Misano round a season best finish of 8th ended Rasmussen's points drought, things were looking good for him until the 3rd race he sustained a heavy crash with Prema driver Amna Al Qubaisi. The closest Rasmussen got to the points was a 13th-place finish, he ended the season 24th and last of his teammates.

He returned for the following season but this time for Prema Powerteam and with his first race of the season he beat his entire tally from the previous year. In the second race Rasmussen was handed a ten-second penalty for overtaking under the safety car resulting in a 14th-place finish. Despite a lot of good results, including three 4th places and a pole position at Imola it took until the final round of the season for Rasmussen to take a podium where he placed 3rd in the first and third race at Monza. Before his double podium Rasmussen was 10th in the championship but ended up finishing 7th, 6 points behind his nearest competitor.

Rasmussen raced with Prema Powerteam in the ADAC Formula 4 in 2019. The first round of the season got off to a bad start, as he retired after he sustained damage crashing into Prema teammate Paul Aron. A handful of good results and points followed before he scored a career best 2nd and first podium of the season at Zandvoort due to Dennis Hauger and Gianluca Petecof crashing in the later stages of the race. Rasmussen went on to finish on the podium once more and end the season in 12th behind Paraguayan Joshua Dürksen.

mtec Motorsport and Rasmussen joined forced as he entered the Toyota Racing Series for the first time in 2020. He finished 11th with two podiums, one fastest lap and 158 points. His best result was 2nd, a race in which he shared the podium with FIA Formula 1 driver Yuki Tsunoda and FIA Formula 3 driver Lirim Zendeli.

On 5 February 2021, Rasmussen confirmed that he would be moving up to the FIA Formula 3 Championship with HWA Racelab to partner Matteo Nannini and Rafael Villagómez. He did not score any points and achieved a best finish of 12th, during sprint race 2 at Zandvoort.

He then drove for Charouz Racing System and ART Grand Prix in the post-season test, but did not sign for either team in 2022, instead switching to the FIA World Endurance Championship. On 4 April 2022, however, it was announced that Rasmussen would be joining teams' champions Trident from round 2 after an ill-fated Jonny Edgar pulled out of the championship. In just his first time back, he achieved his first points finish by finishing seventh. He would not score any more points for the feature race and the Barcelona round.

Rasmussen was replaced at Silverstone by Edgar after the Brit recovered from his health issues. Rasmussen ranked 22nd in the standings with 4 points.