He began kart racing aged nine in a go-kart gifted to him by Michael Schumacher, winning multiple national titles.

[12] That year Doohan also participated in both the German and Italian Formula 4 championships for Prema Powerteam on a part-time basis.

[16] Driving for Hitech Grand Prix, the Aussie won five races and ended up second in the championship, 25 points adrift of the experienced Ukyo Sasahara.

[20][21] Doohan's main campaign in 2019 would lie in the Euroformula Open with Double R.[22] The Australian finished on the podium twice, once at Hockenheimring and at the Red Bull Ring.

[25] In 2020 Doohan progressed to the FIA Formula 3 Championship, driving for HWA Racelab, partnering Jake Hughes and FDA-member Enzo Fittipaldi.

[26] Doohan's high point during the season was seventh in qualifying in Silverstone and topping practice in Spa-Francorchamps, but mainly his campaign was full of incidents and misfortune.

[27][28] Doohan did not score any points during the campaign, and with a best finish of eleventh place, which came at the final race in Mugello, he classified 26th in the drivers' championship.

[38][39] At the Red Bull Ring, Doohan qualified in seventh and finished in the same position in sprint race 1, but was promoted to third place due to numerous penalties from others ahead of him.

[46] Doohan ended 12th in the first sprint race, in which he revealed he purposely kept his spot to block off Dennis Hauger behind for reverse pole.

[60] He qualified 16th on his debut in Jeddah, and in the first sprint race, narrowly missed reverse pole by 0.08 seconds.

[69] However, a collision with Théo Pourchaire at the pit exit during the feature race broke his front wing, taking the Australian out of the battle for the lead.

[80] He would score his first podium of the season on Sunday, ending up second after being overtaken by championship leader Felipe Drugovich in the latter half of the race.

[82] Following finishing seventh in the sprint race, Doohan missed a second podium after he was jumped by Jüri Vips in the pit stops, settling for fourth place.

[89] Doohan qualified fourth for the Paul Ricard round and ended a hectic sprint race in the same position.

[105] He ended up sixth in the drivers' standings with 128 points, three wins, three poles, four fastest laps and six total podiums.

[111] The Australian was back on form in Jeddah, qualifying P4 and securing his first points of the season with seventh in the sprint race.

In the feature race, he was running in fourth and set for a big haul of points until he crashed mid-race at Massenet corner.

[133] A messy qualifying in Monza saw Doohan only 14th, and numerous safety cars in the feature race limited him to only sixth place, knocking himself out of title contention.

In the feature race he had a good start from pole position leading until he pitted on lap 10 for the medium tyres.

He then controlled the race and won by 3.8 seconds which allowed him to jump Ayumu Iwasa for third place in the standings, securing three wins, five podiums, two pole positions and two fastest laps.

[143] Doohan described his switch as being a "no-brainer", stating that the F1 testing programme and the team's project within the World Endurance Championship gave him myriad opportunities for the future.

[146] In September, Doohan tested with the Alpine A521 at the Hungaroring, alongside Antonio Giovinazzi and Nyck de Vries.

[152][153] Doohan again participated in the first free practice with Alpine at the Mexico City Grand Prix.

[155] He drove again in Free Practice 1 for the Abu Dhabi Grand Prix with Alpine, finishing with the 13th fastest time.

This was the fourth fastest time from the rookies participating in FP1, finishing behind Felipe Drugovich for Aston Martin, Robert Shwartzman for Ferrari and Frederik Vesti for Mercedes, but ahead of Theo Pourchaire for Alfa Romeo, Pato O'Ward for McLaren, Jake Dennis for Red Bull Racing, Isack Hadjar for AlphaTauri and Zak O'Sullivan for Williams.

[157] Doohan focused his 2024 campaign on being the reserve driver for Alpine, where he revealed his goal to join the Formula One grid for the 2025 season.

[163][164] Doohan again drove the A522 at Circuit Paul Ricard as he was marked as one of the contenders for a seat with Alpine for 2025 in place of the departing Esteban Ocon.

[1] However, rumors slowly started emerging in late 2024 that Alpine supervisor Flavio Briatore was looking to replace him early in the year with Williams driver Franco Colapinto, who showed promise in his nine Grands Prix in 2024 when stepping in for the axed Logan Sargeant midway.

Briatore did not directly address the rumors, but stated ahead of the season that "if there is a driver who is not making progress, who is not bringing results, he will be changed.

"[173] Speculation intensified when Colapinto signed with Alpine as their reserve driver ahead of 2025, sharing the role with Paul Aron and Ryō Hirakawa.