- Surveying, planning, designing, managing project and supervising construction for urban and rural infrastructure works.

- Preparing reports, monitoring the implementation of social and environmental safeguard policies.

- Communicating, training, building capacity and enhancing community awareness.

- Investing in water supply and waste water treatment projects.

- Producing building materials.

- Constructing office buildings.

- 02 July 2001: Duong Thanh Water and Environment Limited Company was established;

- July 2004: Renamed as Thang Long Infrastructure Development Limited Company (Infra-TL);

- 02 July 2007: Transformed into Thang Long Infrastructure Development Joint Stock Company (Infra-Thanglong) with a charter capital of VND7 billion;

- 07 October 2013: Renamed as Ha Long Investment & Consulting Joint Stock Company (HALCOM) and raised charter capital up to VND35 billion;

- 2014: Charter capital was raised up to VND60 billion;

- 2015: Charter capital was raised up to VND300 billion;

- 22 June 2016: Listed on Ho Chi Minh Stock Exchange (HOSE);

- 11 July 2016: Traded on Ho Chi Minh Stock Exchange (HOSE);

- 18 November 2016: Charter capital was raised up to VND316,066,210,000;

- 23 April 2018: Charter capital was raised up to VND325,542,980,000;

- 22 October 2018: Charter capital was raised up to VND570,542,980,000;

- 02 August 2019: Charter capital was raised upt to VND587,650,320,000;