Mr Tan is the Chairman of Star Energy Group Holdings Pte Ltd and its subsidiaries Star Energy Geothermal Pte Ltd, Star Energy Oil & Gas Pte Ltd, and KrisEnergy Ltd. He is also a Director of SMRT Corporation Ltd., Dialog Systems (Asia) Pte Ltd, Singapore LNG Corporation Pte. Ltd. and Transocean Ltd, and VP Commissioner of PT Chandra Asri Petrochemical Tbk.
He is a seasoned professional in the oil and gas and petrochemicals businesses, with more than 33 years of extensive experience. His working experiences included design, construction and project management of various oil and gas and petrochemical projects, business management and leadership at a senior executive level in the Royal Dutch Shell Group of companies in various locations including Malaysia, Holland, China and Asia Pacific and Middle Eastern regions. From April 2010 to February 2014, Mr Tan was a Director of City Spring Infrastructure Management Pte Ltd, and from February 2009 to May 2015, Chairman of City Gas Pte Ltd.
He is a Chartered Engineer with UK Engineering Council and Fellow with the Institute of Engineers, Malaysia. In 2001, he was conferred Panglima Gemilang Bintang Kenyalang by the State Government of Sarawak, Malaysia, which carries the title Datuk.