Sino-Thai Engineering and Construction Public Company Limited announced that Police General Sanong Wattanavrangkul and Miss. Sanongnuch Wattanavrangkul (Mrs. Sanongnuch Charnvirkul) submitted the resignation letter to the company dated on September 18, 2013 and effective from October 1, 2013. Therefore, the company registered the transformation of Directors to Department of Business Development, Ministry of Commerce since October 1, 2013.