Viettel Construction Joint Stock Corporation, a subsidiary of Viettel Group (the largest telecommunications company in Vietnam), was established in 1995. Headquartered in Hanoi, Vietnam, the company initially focused on constructing and installing telecommunications infrastructure domestically and internationally for its parent company and other clients. Over time, Viettel Construction has expanded its services to include civil construction (residential, commercial, and industrial), information technology solutions, technical services, and infrastructure leasing. The company is listed on the Ho Chi Minh Stock Exchange (HOSE) under the ticker symbol CTR.