Dr Tan was rated by William Mercer Zainal Fraser as the Top Manager for Retirement & Pension Funds in Malaysia.
Dr Tan was the first Executive Director of Arab-Malaysian Unit Trusts Bhd (now known as AmInvestment Services Bhd). He created, developed and launched Arab-Malaysia Gilts, the first unit trust in Malaysia to invest solely in Malaysian Government and bank-backed securities. Dr Tan became the “Pioneer of Fixed Income Unit Trust” in Malaysia.
Dr Tan participated actively in organizing and promoting the concept of raising funds from American investors to invest in Malaysian companies through Malaysia Fund Inc., the first Malaysia closed-end country fund managed by Morgan Stanley and listed in NYSE in 1987.