Appointment of the Chairman of the Board

ST. 010/2010/0034 3rd June, 2010 Subject: Appointment of the Chairman of the Board To: Directors and Manager of the Stock Exchange of Thailand Whereas, the Board of Directors of Sino-Thai Engineering & Construction Public Company Limited (the "Company") convened Board of Directors Meeting No. 2/2010 at 10.30 - 12.00 hours on June 3rd, 2010. The Company would like to inform that such Board of Directors Meeting resolved to appoint Professor Rawat Chamchalerm as the Chairman of the Board effective on June 3rd, 2010. The Company provides this information for your acknowledgment and dissemination to the public and other investors. Sincerely yours, Sino-Thai Engineering & Construction Public Company Limited (Mr. Vallop Rungkijvorasathien) President Company Secretary Office Mr. Chaiyaporn Imcharoenkul (Company's Secretary) Telephone: 0 2610 4900 ext. 274 Facsimile: 0 2259 4427