Thailand has been an oil and gas producer for many decades, with falling reserves amid rising domestic petroleum consumption. Proven oil reserves in Thailand is estimated at around 453 million barrels, while proven natural gas reserves stood at about 10.1 Tcf. PTT Exploration and Production (PTTEP), the upstream subsidiary of state-owned PTT Public Company Limited (PTT), is the dominant player in the Thai petroleum industry. Chevron, Total, Mitsui and BG Group are some of the bigger foreign companies with a presence in Thailand's petroleum sector.
Civil engineering is the discipline dealing with the design, construction, and maintenance, typically of public works such as roads, bridges, canals and buildings. Civil engineers can be involved in nearly every stage of a construction project – from site selection, writing specifications for materials, reviewing bids, and supervising construction. They aim to design and build structures that meet requirements for safety, reliability, cost, and energy efficiency.