The appointment comes, as Mandaric wanted, in time to pick up the Championship campaign when QPR visit the Walkers Stadium on Saturday, City having steadied themselves after their opening-day setback with two draws and a win.
And the City chairman said: “I think Gary has the experience and ability to do the job for us.
“He is a straight, honest guy who impressed me in the talks we had. You can look him straight in the eye and what you see is what you get, a strong personality who can take us forward.
“I didn't want to wait too long for more of the season to pass by, and I hope the fans appreciate my decision and that they will give him their full support.”
Burrows and Taggart, on holiday at the moment, will join up later but Megson, who was scheduled to be formally announced at lunchtime today, will go straight into action with a clear aim.
He said: “Setting up momentum in this division is important, and you do that by winning.”