Former New Zealand wicketkeeper-batter Brendon McCullum was serving as the side's head coach till IPL 2022 but had to quit after being appointed as England men's team head coach in Tests
Shahbaz comes as an injury replacement for Washington Sundar, who has been ruled out of the series due to a shoulder injury sustained during a county game for Lancashire in England
Paddy Upton joins Rahul Dravid's support staff as the mental conditioning coach in the lead-up to the ICC Men's T20 World Cup later this year in Australia.
Jadeja was named the captain of the CSK earlier this year after MS Dhoni relinquished his captaincy ahead of the IPL 2022 season. However, the all-rounder stepped down halfway through the 2022 season as the captaincy was impacting his individual performance.
Neesham was earlier excluded from New Zealand's central contract list for the 2022-23 season and currently does not have a domestic contract as well for the upcoming season.