Zak began karting at the age of eight and just two years later, in 2016, he claimed the rookie championship in British Super One and won the British GP Kartmasters Championship, before moving into European karting in 2017. 

A season in the CIK European OKJ Championship and the WSK European Championship resulted in 10th and 9th places respectively. The British driver demonstrated his progress the following season, bettering his 2017 effort to place 6th overall in the WSK European Championship. In 2018 Zak achieved a 2nd place overall in the OKJ DKM.

In 2019, Zak made a successful debut in the Ginetta Junior Championship, claiming three wins to become Rookie Champion and placing second overall.

The following year, Zak’s maiden season in single seaters saw him finish as vice-champion in the 2020 F4 British Championship. His impressive campaign saw him claim nine wins and 18 podiums, missing out on the title by only four points.

In 2021, Zak entered the GB3 Championship and an extraordinary debut season saw him crowned champion, having secured seven wins and 14 podium finishes. With 20 top ten finishes to his name, Zak’s notable consistency throughout the season saw him win by an impressive margin of 164 points over his nearest championship rival.

Shortly after joining the Williams Racing Driver Academy, Zak was named winner of the BRDC Young Driver of the Year Award. The 17-year old claimed the prestigious accolade after impressing in a series of evaluations, which included fitness and simulator elements as well as a two-day test at Silverstone.

Zak made his FIA Formula 3 debut with Carlin in 2022 achieving two podiums and a pole position at his home race to finish 11th in the driver standings. The Williams Racing Academy driver will race for PREMA in the 2023 FIA Formula 3 Championship.

Zak O’Sullivan

Williams

Italy 2023

Practice 1

Practice 2

Practice 3

Qualifying

Race

Zak runs over to celebrate with the team after his hard-fought Feature Race P2.

PREMA Team Principal René Rosin congratulates Zak on his season’s work.

The extra points also helped Zak’s PREMA team secure the teams’ championship.

God Save the King plays for the all-British podium.

Fizz and a trophy — the perfect way to end the season.

Zak takes a well-earned drink up on the podium.

See the celebrations as Zak O’Sullivan secured P2 in the 2023 Formula 3 championship.

In Photos: Zak O'Sullivan's F3 vice-champion podium trip 

See the celebrations as Zak O’Sullivan secured P2 in the 2023 F3 championship.

In Photos: Zak's vice-champion podium trip

See the celebrations as Zak O’Sullivan secured P2 in the 2023 F3 championship.