On 14 of February 2018, COT was assessed by accredited committee of Thailand Professional Qualification Institute (Public Organization) or TPQI and 9 professional engineers to be an accredited organization for personnel competency of construction, and professional construction supervisor level 4 and 5. Dr.Quanchai Leepowpanth, the executive director was representative of COT accompanied by Mr.Wuttikorn Malee, deputy department manager of construction management and supervision, and Ms.Manthana Tipwareerom, assistant manager of customer relation and business administration hosted and guided the testing places at COT offices in Ladprao soi 124 and 117.