Published Saturday, 15 February 2014
Linfield boss David Jeffrey. (© Pacemaker)
Jeffrey took over from Trevor Anderson as boss at Windsor Park in January 1997.
During his tenure the Blues have won nine league titles and seven Irish Cups.
In the 2005-06 campaign, Jeffrey steered the club to a clean sweep of silverware - as the Blues clinched the league and cup double as well as the league cup and County Antrim Shield.
The 51-year-old is one trophy short of Roy Coyle's tally of 31 trophies.
On stepping down in April, he will have served 17 years and three months as Blues manager and will have overseen almost 1,000 games.
"Linfield FC wishes to announce that the club has accepted the decision of team manager David Jeffrey to step down from his position at the conclusion of the current season," a statement on the club's website explained.
"It is a decision that has not been taken lightly by David and it is a decision that the directors of the club fully understand and respect.
"David has given tremendous service to this club as a player, assistant manager and then team manager and everyone at the club would like to thank him for his efforts, commitment and dedication and of course, the success he has brought to the club over so many years.
"In recent discussions on this issue, David has acted in a most dignified, humble and professional manner, with his only consideration, priority and concern being what was best for the long term interests of the club he loves and cares dearly for.
"There are 11 league games and one County Antrim Shield final remaining in David's tenure as manager of this club and the focus of him, his staff, his players, the directors and indeed, all the supporters of this great club will be to try and win all 12 of those games to win 2 further trophies to give David the best possible send off to his trophy laden career as the longest ever serving manager of the most successful club on this island."
Following the announcement pundits are speculating on who could take up the top role with the Blues.
"I guess speculation will start and people like Glen Ferguson who's doing well at Ballymena United will be linked to the job," Belfast Telegraph sports editor Stephen Beacom commented.
"Stephen Baxter is another one at Crusaders, David Healy the greatest Northern Ireland goal scorer of all time.
"People might want to see him in the job but whoever gets it boy have they got tough boots to fill because Jeffery from my money was the best manager Linfield have ever had."
© UTV News