Richard Dawson has left Gloucestershire to become the new second XI coach at Yorkshire.
The former England international spinner retired from playing in 2011 and was the spin bowling coach at Bristol.
He will replace Paul Farbrace - who has been appointed as Sri Lanka's new head coach - at Headingley.
Gloucester boss John Bracewell said: "We like our coaches to be ambitious and when that is the case you run the risk of losing them.
"As a player, Richard added to our young squad the experience of having performed in the pressure cooker of an Ashes Series and having won a County Championship title with Yorkshire.
"He was a natural to make the progression from our playing squad to our coaching staff and has delivered programmes with a great deal of energy and passion.
"He has also played a big part in maintaining dressing-room morale at a time when the club have had to make some tough financial decisions. We understand his reasons for wanting to join Yorkshire and wish him well."
Dawson, who played in seven Tests for England, said: "I'd like to thank Gloucestershire County Cricket Club, and in particular John Bracewell, for giving me my first opportunity of coaching at a professional level after retiring from playing.
"The transition from playing to coaching was made easy for me in the environment I have been working due to the players and coaching staff at the club, who I'd like to thank."