With England set to fly out to Barbados on Saturday ahead of the series opener on January 22, the side have named Anthony McGrath as batting coach.
The Essex head coach is the latest of a trio of appointments made by the England and Wales Cricket Board this week.
Alan Richardson, the Worcestershire assistant coach, has been brought in as a pace bowling coach, while Paul Tweddle has been named the side's fielding coach, the same as his current role at Somerset.
It's neither McGrath or Richardson's first time in the England setup, with the duo involed in last summer's Royal London victory over Paikistan.
However, it'll be Tweddle's first international role, as he joins the side for the five-match series.
The trio of coaching announcements followed the news that Paul Collingwood would take the reins as England head coach, while Marcus Trescothick will assist him.
England's last T20 outing came back in November, when the side lost in the ICC Men's T20 World Cup semi-finals to New Zealand.