Siam Tone Co., Ltd. was established in January 1989 as a subsidiary company of Tone Corporation which was established in May 1917. Tone Engineering corporation which was a construction department of Tone Corporation and separated from Tone Corporation and became the major share holder of the company.

A successor of Tone Corporation construction, it inherits the technique, the resources, equipment, and material from Tone Corporation and such backbone strengthen Siam Tone's competency as a professional construction firm. At present, we meet the expectation of the customer with underground development and consulting business not only in Thailand but also in the world.

In addition,we have established our own construction method. We are ready to provide service for customer's demand with newest machinery and with the development of new construction method.