The French fullback has worked with Claude Puel at two other clubs.
The 27-year-old was Claude Puel's first choice right back at Nice last season, having featured as a winger earlier in his career, and Pied told L'Equipe that the presence of his former boss at St Mary's was a major reason for him agreeing to move to the Premier League.
"It's important for me to have the confidence of the coach of my new team," he said. "He knows my qualities and knows what I can bring. It's now up to me to pay back this confidence on the pitch.
"We had several discussions. He knows that I have considerable room for improvement and that I can express myself in this league. It's up to me to prove it on the pitch."
Pied was much in demand both at home and abroad after his contract at Nice expired, with L'Equipe suggesting Bordeaux, Saint-Etienne and Trabzonspor were all chasing his services.
But Pied, who will compete with European Championship winner Cedric Soares at right fullback this season, made it clear that he was eager to leave France to experience a different footballing culture.
"I received a good few offers. I looked, I listened, I visited," he added. "I also had contracts on the table. I thought it out well and Southampton was the best choice for me.
"My priority was to have an experience abroad. I also received phone calls from French clubs but I didn't change my course of action and I wanted to see the different proposals from abroad that could have been made to me. I didn't want to have any regrets."
The defender is a former France Under-21 international, and was signed by Puel at the Allianz Riviera in 2012 having also been managed by him after he came through the youth system at Lyon.
It is very apparent that the Saints' new manager has a lot of faith in Pied's ability, and with nearly 200 appearances in the French top flight, it is easy to see why.