Former Zimbabwe captain Andy Flower has been named as England coach Peter Moores' assistant, replacing Matthew Maynard with immediate effect.
Flower had been working with Moores at the England Academy
The 39-year-old has retired from playing cricket with Essex to take up the England job.
He will join up with Moores as England prepare for the first Test against West Indies, at Lord's on 17 May.
Moores said Flower was his number one choice adding: "I feel he will have a significant impact in the future."
I hold Peter Moores in the highest regard...and believe that his selection as England head coach was an inspired choice
It is Moores' first change in the backroom staff since succeeding Duncan Fletcher on 1 May.
He added: "Andy will be joining up with the team for preparation for the first npower Test Match at Lord's next week and I am grateful to ECB and Essex CCC for moving so rapidly and enabling the back room team to be confirmed in time for my first match in charge of the England team."
Flower had been working with Moores and the England Academy over the winter as a batting coach and used that time to qualify as a Level Four coach.
He has not played for Essex this season because of a hip injury but told the club's website he had been looking to return to the team before his new role with England altered his ambitions.
"I would have been available for Monday's game against Kent," he said. "I spent a week in Munich having treatment and then had an injection so I would have been fit enough.
"I was planning to play for a couple of years at least."
Looking ahead to England he said: "I hold Peter Moores in the highest regard...and believe that his selection as England head coach was an inspired choice and reflected well on his work and that of Rod Marsh prior to Peter in setting up the National Academy.
"From my time working with Peter at the National Academy, I know that we shall work very well together and I am excited about entering into this new challenge of coaching an international team."
Flower retires having played 63 Test matches, averaging 51.54 with the bat, and scoring 16,379 first-class runs at an average of 54.05. He was also a wicket-keeper.
He added: "I would like to express my gratitude to Essex County Cricket Club who provided me with the opportunity to play county cricket and supported me so well in my development as a coach."
Maynard had been assistant coach since May 2005 but he and the England and Wales Cricket Board mutually agreed it was time for him to move on.
He said: "It has been a great privilege and invaluable experience for me to work so closely with Duncan Fletcher, the rest of the management team and all the England players at the outset of my coaching career."