2014–2018: Early senior career Hee won the mixed team bronze medal at the
2014 Commonwealth Games in
Glasgow, Scotland. He was also part of the national team that won the men's team bronze medals at the
2015,
2017,
2019,
2021, and the
2023 SEA Games. He made his second appearance at the
Commonwealth Games in
Gold Coast 2018.
2022: Commonwealth Games success Hee opened the 2022 season by winning the mixed doubles title at the
India Open partnering
Jessica Tan. In May 2022, Hee competed at the
2021 SEA Games. He won the bronze medals in the men's team and doubles events. At the
2022 Commonwealth Games in August, Hee was part of the
Singaporean team who won the bronze medal in the
mixed team events as the Singaporean team defeated England 3–0 at the bronze medal playoff. Hee had also competed at the
individual mixed doubles event with his wife, Tan. They won a historic gold medal and Singapore's first Commonwealth Games badminton mixed doubles gold after beating England's
Marcus Ellis and
Lauren Smith in the final, with a score of 21–16, 21–15 in straight sets.
2023–2024: Roller Coaster Journey to Paris Olympics After crowning as the Commonwealth Games mixed-double champion in 2022, the forms of Hee and Tan dipped. The duo suffered early-round exits in their subsequent tournaments in 2022 and won just three out of nine matches in their first six tournaments of 2023. The 2024 Paris Olympics qualification period began on May 1, 2023. However, the chances of the pair qualifying for the Olympics were slim, as they won only one of their next nine matches. The turnaround came after they started playing in lower-tier tournaments to boost confidence. They clinched second place in the
Abu Dhabi Masters (BWF World Tour 100) in October and won the
Iris Open, a BWF international challenge tournament in November. They ended 2023 with another two silverware from BWF World Tour 100 events: winning the
Guwahati Masters and making the final of
Odisha Masters. The haul of points from these tournaments significantly improved their chance to qualify for the Olympics. In 2024, Hee and Tan started the year strong by making it into the semi-final of
Malaysia Open, a BWF World Tour 1000 event. However, since then, second-round appearances were their best in all subsequent tournaments until the end of the 2024 Paris Olympics qualification period. They ranked 18th on the BWF Race to Paris rankings on April 30, 2024, and thus missed out on the automatic qualification spots. There were only 16 slots for the doubles at the Paris Olympics. Only the first 13 eligible pairs were allocated slots via the Race to Paris rankings, while the remaining three spots were given to the continental champions of America, Africa and Oceania. Fortunately, Hee and Tan received a lifeline after Australia, which had qualified in four badminton events, elected to take up the slots in the women’s singles and women’s doubles, thus freeing up a mixed doubles spot for Hee and Tan, the next eligible pair in the rankings. They became the first local-born mixed doubles duo from Singapore to qualify for the Olympic Games. In the
badminton mixed-double events in the 2024 Paris Olympics, Hee and Tan were assigned to Group D together with Feng Yanzhe / Huang Dongping of China (2nd seed), Chen Tang Jie / Toh Ee Wei from Malaysia, and the American pair of Vinson Chiu / Jennie Gai. Hee and Tan played Chen and Toh in the opening match but lost 23–21 and 21–12. Up against China’s world no. 2 pair Feng and Huang next, the duo could not overcome their rivals, losing 21-13, 21-17, thus missing out on the quarter-finals Hee and Tan ended their Olympics campaign with a win though as they beat United States’ Chiu and Gai, 21–17, 21–12 in the last group fixture.
2024: A New Partnership With Jin Yujia Post-Olympics, Hee and Tan continued to contest in major World Tour tournaments, but all ended with 1st round exits. While competing in the
Macau Open, where they were seeded second, their campaign was abruptly halted in the first round against Ye Hong Wei and Nicole Chan (Chinese Taipei). Tan suffered a hamstring injury amid the second set, and the duo had to retire. It was announced in November 2024 that Hee would form a new partnership with
Jin Yujia, as Jessica Tan had not fully recovered from her injuries and was not sufficiently competition-fit. The Hee-Jin partnership had a promising start in their first competition by reaching the semi-finals of
Guwahati Masters. A week later, they made it into the final at the
Odisha Masters but fell 15-21, 21-15, 21-15 in 54 minutes to China’s Gao Jiaxuan and Tang Ruizhi to finish runners-up.. Finally, In only their third competition together, Hee and Jin succeeded in capturing their first title together at the
Bangladesh International Challenge beating India’s Bokka Navaneeth and Ritika Thaker 21-14, 21-16 in the final.
2026: A Multi-National Partnership With Gloria Widjaja The Hee-Jin partnership ended in 2025, as they failed to reach the last 16 in 15 tournaments and were eliminated in the quarter-finals at the
SEA Games 2025. Hee started forming a multi-national mixed doubles pairing with
Gloria Widjaja, a former world junior champion from Indonesia, to compete on the BWF World Tour . ==Personal life==