In this role, the minister mentor will advise Citigroup on its strategic directions and global business. Minister Mentor Lee will provide counsel to Citigroup's senior management and its board on international developments that impact on economies and businesses globally.

Commenting on this appointment, Citigroup's Chairman and CEO Charles Prince said, "Minister Mentor Lee is a modern-day visionary and a unique statesman who is respected world-wide, and it is a privilege for Citigroup to benefit from his understanding, insights and experience."

Minister Mentor Lee is widely recognised as the architect of modern Singapore having transformed the island state from a small trading port into a city state that takes its place amongst the developed countries of the world. He led Singapore as its first prime minister from 1965 to 1990 developing the nation's constitutional system, governing institutions and the economic and political strategies that have propelled the nation into the international arena.

In 1990, Lee was appointed senior minister and in 2004, he became minister mentor to the Singapore government.