Mark Hughes was dismissed following the 2-2 draw against Manchester United, which left the club in 18th place in the Premier League, and Hasenhuttl will officially begin the role on Thursday, the day after Southampton's clash at Tottenham.
New Southampton boss Ralph Hasenhuttl intends to make a name for himself by guiding the club to Premier League safety.
Kelvin Davis, who took charge of Southampton in a caretaker capacity on Wednesday, has been invited to stay on as part of Hasenhuttl's coaching staff, and he has backed the Austrian to succeed.
The Austrian manager has made waves in his first week at the club, warning his new team that the intensity level is going to be upped in an attempt to salvage their flailing Premier League campaign.
Speaking at his official unveiling, Hasenhuttl said: 'The first target is to get out of the relegation zone.
Pochettino's men were in no mood to let Southampton make it nervy for them and two goals in the opening 10 minutes of the second half killed the game.
More celebrities arrive in Udaipur for Isha Ambani's pre-wedding ceremony
Bollywood actor Parineeti Chopra arrives at the Udaipur airport for the pre-wedding celebration of Isha Ambani-Anand Piramal. The three were all smiles as they posed for photographs and were seen chit-chatting with each other.
Insisting he will look to continue the club's record of promoting from the academy, Hasenhuttl said: "We've just had a look at the players we have now; I want to bring them to their limits".
But Hasenhuttl is ready for the challenges ahead.
Southampton face two pivotal away battles in the early relegation stakes by facing first Cardiff on Saturday then Huddersfield on December 22. If someone says it is too much running or work for me they will fall very quick.
"We have a lot of games and my football is all about training sessions, working on habits". It showed me the relationship is good, but they have to accept another style of footballIt is a results business and we have to get them as soon as possible. If you have the chance to do that, okay.
Krueger said the qualities Hasenhuttl displayed in taking unheralded German side Ingolstadt from the foot of the second tier to promotion to the elite augured well for Saints' future.
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