The 51-year-old replaces Mark Hughes and will be supported by Kelvin Davis, Dave Watson and Alek Gross
Southampton have confirmed Ralph Hasenhuttl is their new manager.
Southampton say Hasenhuttl has agreed a two-and-a-half year deal with the club and will take over on 6 December.
In addition, the Premier League club say he will be supported by existing First Team Assistant Coach Kelvin Davis, Head of Goalkeeping Dave Watson and Head of Sports Science Alek Gross.
Most recently, he led RB Leipzig to the Europa League quarter-finals, having finished runners-up in the Bundesliga in his first season in charge.
Southampton chairman Ralph Krueger said the appointment offers a fresh start for the club.
“Ralph emerged as our ideal candidate. As a coach, he embodies the passion, structure, communication skill set, work ethic and appetite for growth that we strive for in our Southampton Way,” he told the club’s website.
“The quick, smooth and seamless negotiation process underlines the character of the person that he is.
“We have been aware of Ralph since his days at FC Ingolstadt, where he showed the qualities that we believe we need at the club. He has since gone on to develop those attributes with a track-record of success in the Bundesliga and with a progressive and ambitious club in RB Leipzig.
“As soon as we met, Ralph’s enthusiasm for football was contagious and his hunger to take on a new and challenging job in the Premier League was evident. In our discussions, he very quickly aligned himself with the values and the vision of the club.
“Southampton Football Club’s past success was built on a clear identity. The foundation of this identity was a focus on developing players, whether from within our academy or after joining from other clubs. Ralph’s ability to teach the game and to develop talent is evident in his past and is a centrepiece of why he is the perfect choice to be the new Saints manager.”
Speaking about his team’s style of play in May, Hasenhuttl said: “I think no matter where I’ve worked, the stadiums have always been full as a result of how we played.
“It’s successful, attractive and represents a particular way of life, and that’s down to our philosophy. There’s a saying: ‘Either you give the people what they want to see or one of you looks for a new stadium’. I agree with that 100 per cent.”