[1] Mok founded HKNet in 1994, and contributed the company's expansion as a major IP telecommunications operator in Hong Kong before its acquisition by NTT Communications in 2000.

He has been actively participating in the community to promote fair competition, media freedom, personal privacy, consumer protection, healthcare, transport, human rights and democracy development in Hong Kong.

Mok is currently a regular columnist for a number of local print media, including the Hong Kong Economic Journal (since 2000) and CUP magazine (since 2005).

Mok commenced a legal action in the High Court of Hong Kong against Tam in relation to the latter's alleged misconduct during campaigning.

Mok was a PhD candidate in Enterprise Management at Shanghai University of Finance and Economics, People's Republic of China.