Dr Lee has twenty years of experience in the CBRE domain and is instrumental in the strategic building and development of CBRE capabilities in Singapore.

He started his career in 1989 as a Research Scientist at OSO National Laboratories, an affiliated organisation under the Ministry of Defence. From 1993 to Oct 2003, Dr Lee headed the Centre for Chemical Defence in DSO. Subsequently in Nov 2003, he was appointed the Deputy Director of the Defence Medical and Environmental Institute at DSO to manage defence research and development in the areas of environmental protection, biomedical sciences and human performance. He was concurrently the Director of the Chemical, Biological and Radiological Programme at DSO National Laboratories.

Dr Lee's pioneering efforts in building Singapore's CBRE defence research won him several awards, including the Defence Technology Prize. He was also conferred the credentials of Chartered Chemist by the Royal Society of Chemistry.

In May 2006, he left DSO National Laboratories to join the Ministry of Home Affairs.

As a concurrent appointment, Dr Lee was appointed by the Minister for Foreign Affairs to be the Director of the National Authority (Chemical Weapons Convention) from May 2000 to April 2007. Dr. Lee was involved in steering Singapore’s policy and implementation strategies in the domains of weapons of mass destruction treaties,
like the Chemical Weapons Convention (CWC) and Biological Weapons Convention (BWC). Today, he remains a key advisor in the National Authority (CWC) Advisory Board that oversees the strategic and policy issues in this area.

Dr Lee is well regarded in both the local and international scientific communities. His alliances range from technology institutes in chemical and biological defence to international organizations like the Organisation for the Prohibition of Chemical Weapons (OPCW), the Expert Group for the Biological Weapons Convention and
the United Nations Monitoring, Verification and Inspection Commission (UNMOVIC).