Brendon McCullum will be England's new white-ball head coach and will combine this role with his existing duties in Test matches.
McCullum has agreed to a new three-year deal as part of what the ECB has termed a "strategic restructure" within the men's set-up.
The contract extension, announced on Tuesday, means that McCullum is set to oversee England's white-ball fortunes till the next 50-over World Cup in South Africa in October-November 2027, while also guiding the Test squad through to England's next home Ashes campaign earlier that year.
Assistant coach Marcus Trescothick will fill in as the interim white-ball coach for the upcoming home series against Australia later this month and the tour of the Caribbean in October-November.
McCullum will begin his twin duties in January 2025 with the white-ball tour of India, and the ICC Champions Trophy in February and March.
This comes in the wake of Matthew Mott's sacking as white-ball head coach in July, following England's disappointing defence of the 50-over and T20 World Cup titles.
"I've thoroughly enjoyed my time with the Test team, and I'm excited to extend my role to include the white-ball sides," McCullum said. "This new challenge is something I'm ready to embrace, and I'm eager to work closely with Jos and the team to build on the strong foundations that are already in place.
"(Managing director) Rob Key's vision for the future of English cricket is something that really resonated with me. The idea of a unified coaching structure... made perfect sense."