[4] Kwok was charged with collusion and an arrest warrant with a HK$1 million bounty was issued by the Hong Kong Police in July 2023.

[citation needed] He subsequently left his practice as a solicitor to join the Bar in 2006 with a focus in civil and public administrative law.

In 2007, he co-founded The Professional Commons, a public policy think-tank, and in 2008, he joined the Citizens Commission for Constitutional Development headed by the former Chief Secretary, Mrs. Anson Chan.

[10] In April 2020, pro-establishment lawmakers argued that Dennis Kwok was "no longer fit" to preside over sessions as his continued filibustering tactics had left multiple pieces of legislation in limbo.

[12] The move was vociferously opposed by democratic members, and led to shouting and scuffles in the chamber, during which eleven opposition lawmakers were ejected.

[13][14] Five weeks ahead of the (subsequently postponed) 2020 Hong Kong Legislative Council Election, on 30 July 2020, as Kwok prepared to defend his seat, the government stated that he was among a dozen pro-democracy candidates whose nominations were 'invalid', under an opaque process in which, nominally, civil servants – returning officers – assess whether, for instance, a candidate had objected to the enactment of the national security law, or was sincere in statements made disavowing separatism.

[19] Following his departure from Hong Kong, in August 2021 Kwok was named as a Distinguished Scholar in the Asian Studies Program of Georgetown University’s School of Foreign Service.