Born:  December 2, 1948
Education:
- Bachelor’s Degree (Honours) in Civil Engineering, Chulalongkorn University, Bangkok
- Master’s Degree and PhD in Civil Engineering, University of Texas at Austin

Dr Viroj began his career in the petroleum and petrochemical businesses at the then Natural Gas Organization of Thailand (NGOT) which had become a part of the state-run Petroleum Authority of Thailand (PTT) in 1978, before being incorporated as PTT Plc and listed on the Stock Exchange of Thailand in late 2001.
In 1994, he was appointed deputy governor for corporate finance, and a year later …

Thai Oil Plc., the country’s top oil refiner, yesterday said its 2008 net profit has nosedived to only 224 million baht from nearly 19.12 billion baht in the previous year, due to the falling oil prices that hit inventories.
Thai Oil’s managing director Viroj Mavichak said although the sale revenue for the full year had risen to 399.13 billion baht, an increase of about 138 billion baht from the previous year, due to the higher oil prices and the capacity expansions of the company and its subsidiary Thai Paraxylene, the oil …