Later, he came back to work for Thai government in the Department of Mineral Fuels (DMF). Mr. Tananchai use his expertise as a Senior Professional Geologist to carry on his career in Petroleum E&P business. His research as a result of his
extensive knowledge, regarding to subsurface geology in Thailand and vicinity area is cited in many international journals. Mr. Tananchai also diversifies his subject of interest on cross-sectoral collaboration between inter-government organizations such as ASCOPE, AFOC under ASEAN cooperation. Of which, his initiation on CCUS cooperation in ASEAN and Clean Coal Technology study are currently on stream at the moment.