Thang Duc Tao

Viettel Global Investment JSC engages in telecommunication investment and development. Its activities include software development for telecommunication, information technology, electronic, and internet; manufacture and trading of information technology, electronic, and telecommunication equipment; and technical consultation for telecommunication industry. The company was founded on October 24, 2007 and is headquartered in Ha Noi, Vietnam.

Viettel Group provides telecommunications services. Its services include enterprise, customer and government. The firm serves information technology, telecommunications, research and manufacturing, post, import and export, retail, education ecosystem, and Vportal.one sectors. The company was founded on June 1, 1989 and is headquartered in Hanoi, Vietnam.

Viettel Consultancy & Services JSC engages in the provision of telecommunication construction consultant and design services. Its products and services include telecommunications infrastructure design, office building design, construction supervision, and investment project planning. The company was founded on October 30, 1995 and is headquartered in Hanoi, Vietnam.