Troussier, accompanied by his assistant Moulay Lahsen Azzeggouarh Wallen, was surprised at the welcome by a crowd of supporters and reporters at Noi Bai National Airport.
"I am happy to return to Vietnam, a country that I have already known," said Troussier after two years away since his last task.
"I am proud to be the head coach of the Vietnamese national team. It is a big honour for me. I will have many missions in the future. I am full of energy in this return and now I am ready for them."
Troussier will officially sign a three-year deal with the Vietnam Football Federation (VFF) on February 27 morning in Hanoi.
The 67-year-old tactician will take charge of both the national team and the U23 squad.
He requires a crew of more than 10 assistants, most of them used worked with him since he led U19 Vietnam and worked at the PVF Football Centre as a technical director.
