Nil Khosol Offers consulting services in mechanical design and construction. Also offers fabrication and installation of power plants, pressure vessels, storage tanks, and more.

Siam Cement Group Has web directory of subsidiaries of Siam Cement Group, a conglomerate active in petrochemicals, cement, paper and packaging, building products and ceramics.

Siam Pantech Engineering Co., Ltd. Design, engineering and installation of electrical and air-conditioning systems for industrial and residential buildings.

Sonkla Reefer Service Provides reefer, cleaning, repair, and depot services for dry vans and containers. Also offers repair and maintenance services for offshore oil equipment.

Stewart Engineers Limited. Civil engineering consultants. Expert opinion on structural, tunneling, building, contractors claims. Litigation, mediation, arbitration assistance. Project and construction management.

Tomaryk Design (Thailand) A professional design company specializing in architectural, interior and landscape design and project management consultancy services.