Service is a Joint-Venture established since 1992 between Teo Hong
Silom Co., Ltd. and Elyo S-East Asia Pte., Ltd., a subsidiary of
ELYO (visit them
which has an annual turnover over 2 billion US as the energy arm
of French group Suez-Lyonnaise des Eaux.
Prompt Techno Service is present in Bangkok area, eastern seaboard
and south of Thailand with a force of more than 360 staff engineers