He was the former special adviser to former United Nations (UN) secretary-general Kofi Annan on the establishmente of the UN Ethics Office.
He was also an adviser to Bank Negara Malaysia.
These are just a few of the many achievements of Kedah-born Tunku Abdul Aziz Tunku Ibrahim.
In recognition of his anti-corruption initiatives over the years, the University of Tasmania conferred Tunku Abdul Aziz with an Honorary Doctor of Laws in 2011.
Known as a staunch advocate of integrity and transparency, Tunku Abdul Aziz has always been on the front line in speaking up against corruption.
Having been offered a platform by the DAP to further champion his fight against corruption, Tunku Abdul Aziz joined the party in 2008 and was later appointed as its national vice-chairman.
However, a few years down the road, the two parted ways, with Tunku Abdul Aziz citing irreconcilable differences.
As a guest of Malaysia Outlook Vision Channel (MOVC), Tunku Abdul Aziz speaks to Farah Harith about his experience with DAP and why he is of the opinion that they are not capable of leading the nation.