In 2012, Kwok joined Pegasus as an assistant coach alongside Chan Chi Hong.

In December of the same year, he led the team to win the title of the 2018 Guangdong–Hong Kong Cup after beating Guangdong in the penalty shoot-out.

In April 2018, Kwok was appointed as the head coach of Hong Kong U-23 to participate in the 2018 Asian Games.

In July 2019, Kwok was appointed as the co-head coach of Tai Po, along with Fung Hoi Man.

[5] On 5 April 2022, Tainan City reached an agreement to hire Kwok as their next head coach.