Pichai will replace Prasarn Trairatvorakul, who completed his three-year term as SET board chairman on Monday.
The SET board also voted to elect Pichet Sithi-Amnuai as deputy chairman.
Both Pichai and Pichet will be in office for three years retroactively from Monday, when Prasarn’s term expired.
Pichai has a bachelor’s in business administration from Thammasat University under his belt and a master’s in the same subject from the Indiana University of Pennsylvania. He has been the chairman of the Bangchak board of directors since 2012 and was also a member of the Bank of Thailand’s board of directors from 2014 to 2017. Pichai was also a director at PTT Exploration and Production Plc from 2001 to 2013. Pichai is also an adviser to Prime Minister Srettha Thavisin.
Pichet, meanwhile, has a bachelor’s in engineering from Chulalongkorn University and a master’s in business administration from the University of Texas in Austin.
He is currently president of Bualuang Securities.
The board comprises 11 members.