Thomas is the founder Chairman of ARAIBA Sdn Bhd, the successor organisation to ASEAN CSR Network of which he was the founder and CEO.  He is also the co-convenor of the ASEAN Circular Economy Business Alliance (ACEBA). Thomas has been involved in responsible business, CSR and sustainability since 2004, when he co-chaired Singapore’s National Tripartite on CSR and set the direction for business responsibility in Singapore.  

Thomas has extensive experience in CSR and responsible business conduct, serving on various initiatives in the region and globally as the founder of Singapore Compact for CSR (2005) and in the set-up of ASEAN Corporate Social Responsibility Network (ACN) in 2010.  ACN was established to promote and enable responsible business conduct in ASEAN Member States.

Thomas is the Chair of the ISO26000 Stakeholder Global Network (SGN) since 2022.  

Thomas had been active with trade unions, co-operatives, the consumer movement and social enterprises and also served as a Nominated Member of Parliament in Singapore.

Thomas holds a Master of Arts in Industrial Relations from Warwick University, UK.