Sims, like his teammate Antonio Félix da Costa, is a product of BMW's works motorsport outfit, driving for the team in the World Endurance Championship.

Starting his racing career in karts in 1998, Sims went on to clinch the McLaren Autosport BRDC Award for promising young British drivers ten years later. The following year, the British driver progressed to Formula 3, where he started to combine single-seater driving with GT and sportscar racing in series such as Blancpain Endurance, British GT and 24 Hours of Le Mans. 

Making his debut in the ABB FIA Formula E Championship ahead of the 2018/19 season, the British driver set the fastest times during pre-season testing for two out of the three days. With a self-declared interest in renewable energy and electric cars, Sims is well placed to race for a manufacturer that prides itself on it's hybrid and all-electric cars. Partnering with seasoned Formula E driver Antonio Felix da Costa, both drivers pilot the BMW iFE.18.