- Constructing electricity transmission network and electricity substations with the voltage of up to 500kV.

- Constructing civil, industrial, transportation and irrigation works.

- Producing and trading electricity.

- Other activities under business license.

- April 8, 2003: VNECO1 Electricity Construction Joint Stock Company, formerly Electricity Construction Company 3.1 directly under Electricity Construction Company 3, was established;

- December 6, 2004: Company was equitized and renamed as Electricity Construction And Installation Joint Stock Company 3.1 with initial charter capital of VND5.5 billion;

- January 2006: Increased charter capital to VND6.5 billion.

- On Mar 26, 2006: Renamed as VNECO1 Electricity Construction Joint Stock Company;

- February 2007: Increased charter capital to VND10 billion.

- May 2007: Increased charter captial to VND30 billion.

- Septmber 4, 2008: Company's stock was listed on HNX;

- 2018: Increased charter capital to VND60 billion.