Lord's groundsman Mick Hunt will retire at the end of the current season after 49 years in the role.
Hunt joined the Lord's groundstaff in December 1969 and became head groundsman in 1985 following the retirement of Jim Fairbrother.
The MCC will now begin a recruitment process for Hunt's successor and the new man will begin with a very high-profile 2019 season which will include Lord's hosting the World Cup final and an Ashes Test against Australia.
Hunt's last international pitch will be for the second Test against India next month.
"Mick has given outstanding service to MCC and to Lord's, and he will be a very tough act to follow," said John Stephenson, MCC assistant secretary. "World Cup Finals, Tests and one-day internationals featuring some of the biggest names in cricket have all been played here on pitches that he has prepared.
"There is something special about playing on the hallowed turf at Lord's that inspires cricketers at every level to deliver great performances, with some earning a place on the Dressing Room Honours Boards. Mick retires one year short of a half-century, but his place in the history of Lord's is assured."