Hazwan was a former student at Brunei's Sports School.[3] He first started playing league football with Rimba Star FC in the 2011 Brunei Premier League II and was even made captain of the club based in Kampong Rimba.[4]
After his involvement with the national team winded down in 2014, Hazwan joined Majra United FC at the beginning of the Super League season,[5] then Indera SC where he won the championship.[6] He stayed at Indera until 2017, joining Brunei's sole professional club DPMM FC after a short trial.[7]
Hazwan made his DPMM debut in the 4–0 loss against Albirex Niigata Singapore FC on 16 June 2017 as a second-half substitute.[8] In the game against Home United on 8 September, he was shown a second yellow card but was not immediately sent off until after two minutes elapsed when the referee was duly reminded to do so.[9] After 13 league appearances in total, Hazwan was released after the season concluded.[10]
Hazwan rejoined Indera SC in time for the FA Cup semi-final against Kasuka FC in March 2018.[11] He finally won an FA Cup medal by beating MS PDB in the final by 2 goals to nil.[12] He left the club to join DPMM for a second time in February 2019.[13] The 2019 season was a successful one for Hazwan as he made 11 league appearances as DPMM became champions by September.[14]
The COVID-19 pandemic forced the club to play domestically for the next two seasons.[15] Competing in the 2022 Brunei FA Cup, Hazwan and his team managed to go all the way to the final on 4 December against Kasuka FC where they emerged 2–1 victors and secured the club's as well as his personal second FA Cup triumph.[16]
Hazwan departed DPMM and joined Kasuka at the beginning of 2023, alongside Shah Razen Said, Abdul Aziz Tamit, Nur Asyraffahmi Norsamri and Danisyh Syariee Masrazni.[17] The star-studded team went through the season with 16 victories in as many games, leading Hazwan to gain another Bruneian championship medal.[18]
Hazwan made two further appearances for the national team in friendlies against Singapore and Cambodia later that year. He was earmarked for the 2016 AFC Solidarity Cup held in neighbouring Malaysia but did not make the final squad.
^"Brunei Darussalam". Information Department, Prime Minister's Office of Brunei. 7 February 2007. Archived from the original on 31 December 2012. Retrieved 29 June 2017.