Not an assistant manager - another first team assistant coach. Effectively replacing Rohl's video analysis, you would expect.
Stole this from Facebook...,,. Kitzbichler appears to be an experienced head with a good eye for analysis. After concluding his playing days in Austria with Red Bull Salzburg, he took up a role in their well-esteemed setup. The club’s official statement claims that he worked in close contact with the team’s players and coaches after becoming an analyst for the Austrian Bundesliga club, whose conveyor belt of talent has continued to roll on in the past few years. There have been some excellent players come through the ranks at Salzburg, and much of this is owed to the meticulous work behind the scenes at the club. Following an impressive stint as an analyst, Kitzbichler was promoted to the first-team coaching staff in 2015 as he became former Brighton and Hove Albion manager Oscar Garcia’s assistant boss. Since, he has moved to China, linking up with Roger Schmidt following his time in Austria with Salzburg, and pastures new now await the former Hamburg player at St Mary’s. This isn’t necessarily a notable appointment, nor is it one that will be well publicised. But Salzburg’s ethos and strategy of the pitch is not dissimilar to that of Southampton’s; there is an emphasis on youth development and ensuring that a pathway to the first team is established.