Mr Sia is also an Adjunct Associate Professor with the National University of Singapore and immediate past Chair of the ASEAN Joint Sectoral Committee on GMP Inspection. 

Periodically, he contributes review articles to various international scientific journals and technical magazines, particularly, in the field of regulatory science for health products. His key interest areas include the regulation of both traditional and innovator health products, active pharmaceutical ingredients and excipients, supply chain and data integrity, quality by design and continuous manufacturing, ASEAN harmonization on pharmaceutical inspections, and comparative international pharmaceutical and biopharmaceutical regulations, in general.

In 2016, Mr Sia received the International Pharmaceutical Society of Pharmaceutical Engineering (ISPE) Singapore Affiliate Lifetime Achievement Award for his contributions to pharmaceutical regulatory practices and leadership in driving the harmonization of GMP Inspection standards across the 10 ASEAN Member States. In 2017, an article which Mr Sia co-authored was named the winner of the ISPE Roger Sherwood Article of the Year Award. He holds a Bachelor’s degree in Pharmacy from the National University of Singapore, and a Master’s degree in Healthcare Management (with distinction) from the University of Wales.