He started playing football when his father took him to play for Feltham Youth, before later joining Conquest Football Academy. Sibbick gained a trial for AFC Wimbledon after playing against them and then subsequently being scouted.[5]
Career
AFC Wimbledon and early career
After being scouted, Sibbick signed his first professional contract with AFC Wimbledon, and made his professional debut on 17 April 2017 in a 0–0 draw against Peterborough United.[6]
He scored his first goals for Wimbledon when he scored twice in an EFL Trophy tie against Tottenham Hotspur Under-23s on 3 October 2017.[7] On 26 January 2019, Sibbick came off the bench scored the fourth goal against West Ham United in the FA Cup fourth round to seal a famous 4–2 win for AFC Wimbledon.[8]
On 4 August 2020, Sibbick joined Belgian First Division A side Oostende on a season-long loan deal,[12] which was eventually terminated early in December 2020 as Sibbick had difficulties manifesting himself due to the good performance of other young defenders.[13][14]
He scored his first goal for Barnsley in a 1–1 draw with Cardiff City on 7 August 2021.[15]
Heart of Midlothian
On 27 January 2022, Sibbick signed with previous loan club Heart of Midlothian on a three-and-a-half-year deal for an undisclosed fee.[16] He made his second debut for Hearts in a 2–0 home win against Motherwell two days later, coming on at half time to replace an injured John Souttar.[17]
Sibbick was called up to the Uganda national team for a set of friendlies in March 2024. He debuted with them in a 2–2 draw with Ghana on 27 March 2024.[20]
Style of play
Sibbick is well known for his versatility, work-rate, and fitness levels, in mainly defending but also the attacking sense. He can operate in mainly defensive positions but has the footballing ability to play further forward if needed. He has been described as: "So comfortable on the ball, as he can also get up and down the pitch brilliantly" and "tall, athletic and has the ability to easily beat his man and find a teammate".[5]