Mr.Wirat is an Electrical Engineering graduate from Chulalongkorn University and MBA graduate, majoring in Financial Management, from Pennsylvania State University with Beta Gamma Sigma.
In 1988, Mr. Wirat joined the Shell Company of Thailand as Refinery Project Business Manager. Since 1993, he has moved his career to the field of finance and banking and held several executive positions in multiple companies as follows;
- CMIC Finance & Securities Public Company Limited in 1993
- Nomura International Hong Kong/Capital Nomura Securities Public Company Limited in 1997
- United Securities Public Company Limited in 2002
- ABN AMRO Bank N.V., Bangkok Branch in 2003
Mr.Wirat joined Thai Oil Public Company Limited as Deputy Managing Director of Finance in 2005 and IRPC Public Company Limited as Senior Executive Vice President of Corporate Accounting and Finance in 2011. Later in 2012, he was appointed to be Executive Vice President, Corporate Finance, at PTT, and was promoted to Chief Financial Officer in early 2014.