The company was established in 1922 to undertake engineering work on the Bangkok-Aranyaprathet Railway, which connected Thailand to the Cambodian border for the first time.

IEC participated in building up the infrastructure of the country as it rapidly modernised.

IEC was involved in the reconstruction efforts following World War II.

It is running and implementing a collective 16 MW solar and waste-to-energy power plants in Thailand, also providing information and communication solutions to state and private corporations in Thailand.

You can help Wikipedia by expanding it.This Asian corporation or company article is a stub.