Mark Benson has stepped down from his role as an umpire with the England and Wales Cricket Board due to a back injury.
Benson, who has been a first-class umpire since 1997, will be replaced on the list by Billy Taylor.
The former Kent and England batsman was a member of the International Cricket Council's elite panel and stood in 27 Tests and 91 limited-overs international matches, including the 2007 ICC World Twenty20 final between India and Pakistan in Johannesburg.
The 57-year-old, who has recently undergone surgery on his back, returned to county cricket in 2009 after having to stand down during a Test between India and Australia at Adelaide because of stress-related ill health.
Former Sussex and Hampshire seamer Taylor will take over this season having been on the ECB's reserve list for the past five years.