Dave represented ParalympicsGB at the Beijing Games as a swimmer, before repeating his feat as triathlete in Tokyo. He also has multiple World Championship and European titles to his name.
He finished fifth in the 200m Individual Medley as a swimmer at the 2008 Beijing Paralympic Games before he made the switch to paratriathlon in 2013 where he races with a guide due to having less than 10% of his vision. He made an immediate impact in the sport securing the European title in Turkey before being crowned world champion in Hyde Park London, alongside guide Luke Watson.
2014 saw Dave pick up five medals as he added to his collection. He did not add to that tally though in 2015 as he chose to focus on track running after learning the PTVI category had been omitted from the Rio 2016 Paralympic Games.
He returned to paratriathlon in 2017 and claimed European and World titles again, this time alongside Carl Shaw. Dave set his sights on the Tokyo Games when it was announced that the PTVI category would feature at the next Paralympic Games. Alongside Mark Buckingham he again was crowned World and European Champion in 2018. He continued his fine form in 2019 with another seven medals including wins at Groupe Copley World Paratriathlon Series Montreal and Funchal ITU Paratriathlon World Cup.
In 2021, Dave represented GB ParalympicsGB at the Tokyo Paralympic Games. He raced in the Games alongside Luke Pollard but a mechanical on the bike put an end to their medal hopes.
Dave then went onto win 10 straight gold medals, an unbeaten run that lasted almost two years and included a World title win in Abu Dhabi, a European title win in Spain and a Commonwealth Games gold on home soil in Birmingham. He also won the first ever stand alone British World Triathlon Para Series race in that time claiming gold in Swansea.
His winning run came to an end in 2023 as he finished second at the European Championships in Madrid after the race had been changed to a duathlon due to water quality issues. He returned to winning ways at 2023 World Triathlon Para Cup A Coruna before he added a sixth British title to his collection. He then won a sixth world title, a third alongside Pollard, in Spain before he rounded off the season with his sixth straight win at World Triathlon Para Cup Alhandra this time being guided by Jack Hutchens.