He competed for his nation at the 2017 Asian Junior Wushu Championship, which took place in Gumi, from 14 to 21 September 2017.[3] Again in the 2019 Asian Junior Wushu Championship, where he finished gold in his group.[1][4] In the 2017 Sarawak International Wuwang Cup Wushu Invitation Championship at Stadium Perpaduan Negeri Sarawak, Hosea placed second and third with 17.97 points.[5]
Hosea was part of the first group from Brunei to travel to the 19th Sukma Games 2018, which took place from 12 to 22 September in Perak. Under Li Hui's tutelage, he would compete in taijijian and taijiquan competitions.[6] In the men's taijiquan competition, he came in eighth. "Hosea actually did well as this is the first time that he competed in Sukma," Li Hui remarked of his achievement.[7] Hosea almost missed the podium in 2019 SEA Games, having earned bronze in the taijijian event and silver in the taijiquan event with 9,590 points.[8][9][10]
In the men's taijiquan event, he received 9.48 points in the 31st SEA Games, placing him considerably outside the podium. He competed in the men's taijijian event, however his effort to win a medal would be in vain.[11] After taking silver in the men's combined taijijian and taijiquan event at the Bill Battle Coliseum in Birmingham on 14 July 2022, he contributed to the nation's historic achievement at the World Games 2022.[12]
Hosea won the men's taijiquan + taijijian event at the Chroy Changvar Convention Center, earning Brunei's second gold medal at the 2023 SEA Games. This time, he made sure to place first on the podium, defeating ten other competitors with a total score of 19.189,[13][8] defeating Tan Zhi Yan of Malaysia and Goolsawadmongkol Katisak of Thailand.[14][15][16] A few months later at the 2022 Asian Games (hosted in 2023), he did not place in the men's taijiquan event.[17]
