During and after the Asian financial crisis, he was the President of the Board of Directors of Siam Cement — which is one of the biggest corporations of Thailand — from 1998 to 1999, and of Siam Commercial Bank — the country's second largest bank — from 1998 to 2007. Since 2007 he has again led the Board of Directors of Siam Cement.
From 1998 to 1999, he held leadership positions at Siam Cement and Siam Commercial Bank during and after the Asian financial crisis. He returned to lead the Board of Directors of Siam Cement in 2007.