Kenny Black has resigned as Airdrie United assistant to join Craig Levein as coach at Leicester City.
Kenny Black has left Airdrie United
Levein had already taken Peter Houston, his own assistant at Hearts, to the Coca-Cola Championship outfit.
Black was a tough-tackling yet skilful midfielder with Rangers, Hearts, Airdrieonians and Raith Rovers.
Airdrie chairman Jim Ballantyne said: "The board will meet with manager Sandy Stewart this week to consider the next step in considering a successor."
Black helped Airdrie United win promotion to the Scottish First Division last season.
"Everybody has seen Kenny's approach to the job and it is no surprise that it has been noticed elsewhere," Ballantyne told his club's website.
"As you would expect, from the moment the matter arose on Sunday afternoon, Kenny handled it in a thoroughly professional manner and there was only ever going to be one outcome.
"It is a chance in a lifetime for Kenny and there was no way we could ever have stood in his way. Nor would we have wanted to.
"Our philosophy at Airdrie is that we want to attract great quality to our set up and part of that deal is that if the big chance comes for anybody then we will not hold them back, subject to satisfactory arrangements being agreed.
"I am absolutely certain that he will play an integral role in the turnaround of Leicester's fortunes."