[2][3] Upon leaving army in June 1998, Han was appointed as the chief executive officer of the Land Transport Authority till July 2003.

[4][5] Han was awarded a Singapore Armed Forces Overseas Scholarship in 1973 and graduated with a Master of Science.

[8][13][14] Under his leadership, the operational readiness of the army was enhanced, through the acquisition and production of the BIONIX AFV and upgrading of the Ultra M113.

[15] In 1995, Han led the first SAF delegation to Vietnam, aimed to build mutual understanding and cooperation between both countries and the region, and in 1997, he officiated the first bilateral exercise between armies from Singapore and Thailand.

[9][22] On 28 August 1998, when the Electronic Road Pricing (ERP) was still in its testing phase, 1,562 motorists were charged erroneously, ranging from S$0.5 to S$3.