Walter, 49, was most recently coach of South Africa's one-day international and Twenty20 teams but knows New Zealand cricket well after stints in charge of provincial teams as well as his time overseeing a Black Caps "A" tour of India in 2022.
Stead said the World Test Championship triumph in 2021 and New Zealand's 3-0 sweep of India on the sub-continent last year were the highlights of his time in charge.
Gary Stead announced Tuesday he will step down as New Zealand's white-ball cricket coach and is considering his future with the Test team.
If South Africa beat New Zealand to reach Sunday's decider, they will at least know by then if they will take on India in Dubai, or Australia in Lahore.
The Champions Trophy is the first major cricket event hosted by Pakistan in nearly three decades and is regarded as second only to the World Cup in the one-day game.
"As a young kid it was always my dream to play for New Zealand and I feel incredibly lucky and proud to have played 367 games for my country," Guptill said in an statement to New Zealand Cricket (NZC).
Santner, who has played 107 one-day internationals and 106 Twenty20 internationals, will begin his tenure with a three-match home ODI series against Sri Lanka from December 28.
The 34-year-old failed a drugs test after a domestic T20 game in January.
The White Ferns’ received a warm welcome from friends, family and fans when they landed at Christchurch airport on Friday, with the T20 World Cup trophy proudly on display.
Working with Herath would benefit Ajaz Patel, Mitchell Santner and Rachin Ravindra, said Stead.
Oram will commence the role vacated by Shane Jurgensen towards the end of last year on October 7, with New Zealand's three-match ICC World Test Championship series in India the first assignment for the 46-year-old.
Latham spoke to reporters on Wednesday as New Zealand Cricket released its summer schedule, which starts with a three-test series against England in November before white-ball series against Sri Lanka and Pakistan.
Williamson's decision marks the end of an era for a New Zealand team which made the semi-finals of the previous three T20 World Cups and the 2021 final but ultimately missed out on a maiden white-ball title.
Having made at least the semi-finals of the last three editions, New Zealand crashed out in the opening round this time.
Stead, who took over as New Zealand coach in 2018 and led them to the 2021 final, has a year left on his contract.
The 37-year-old lefthander's last international was a T20 match against India in 2020 -- but he had long hoped to claw his way back into the squad.
Kane Williamson will captain the T20 World Cup squad for a fourth time as New Zealand hunt for a maiden title after reaching the semi-finals of the last three tournaments and the final in 2021.
New Zealand all-rounder Rachin Ravindra became the youngest player to win the Sir Richard Hadlee Medal, the highest award for men's cricket in New Zealand, on Wednesday.
Despite being named in the original squad, Williamson will undergo further rehabilitation after knee surgery last April, while Jamieson is nursing a hamstring injury, the Black Caps said.
