Timothy started his career as an Information Technology officer at the Hong Kong Shanghai Banking Corporation (HSBC) after acquiring the Bachelor of Engineering in 2000. He was responsible for overseeing the implementation of various system infrastructure designs and providing technical consultancy advice for various IT projects.

After acquiring another Bachelor degree in Laws in 2006, he took on the position of Investigator with the Independent Commission Against Corruption (ICAC) in Hong Kong. In there, he was responsible for undertaking inquiries and investigations including money laundering and relevant corruption cases.

Then he further joined the Customs and Excise Department in Hong Kong as an Inspector and engaged in the money laundering investigations on drugs and smuggling-related offence in the field of Financial Intelligence and Investigation. Starting from 2010, he joined the local FIU (JFIU - Joint Financial Intelligence Unit) for acquiring concrete and wide exposures on various kinds of Financial Intelligence and Suspicious Transaction Reports (STR) filed by different sectors in one of the most busiest hubs in Asia - Hong Kong.

Between 2019 to 2022, he further equipped himself by acquiring professional qualifications on Certified Anti-Money Specialist (CAMS), Certified Global Sanctions Specialist (CGSS) and Advanced CAMS-Risk Management (CAMS-RM) by the Association of Certified Anti-Money Laundering Specialists (ACAMS).