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.
Electrical engineering deals with the study, design, development and testing of electronics and electrical equipment. Engineers in this field can specialize in several sub-disciplines such as power, controls, electronics, instrumentation, communications and more. It is a broad field that spans the industry and requires in-depth knowledge of electronic theory, mathematics, CAD systems, reading schematics and circuit layout.