Jody Morris has penned an emotional letter.
He said, “When Lamps, or the gaffer as I should say, signed for Chelsea originally we became really good mates.
“I roomed with him on his first pre-season trip and we’ve remained close ever since.
“We always spoke about working together if he went into management and we really enjoyed last season at Derby.
“Now we are here at Chelsea and it feels amazing.
“I’ve seen first-hand how Frank can galvanise a place, he brought the fans and the club together at Derby, and the way the place was united throughout the club was largely down to how Frank went about his way as a manager.”
“It’s an amazing feeling to be back,” he added.
“This is my club, it’s the team I supported as a boy and I was lucky enough to go through the ranks as an eight-year-old to then play for Chelsea.
“Obviously the five years I had working in the Academy were amazing but after leaving for Derby last year, to come back now really does feel like I’ve come home.”
He will be joining as Chelsea boss Lampard’s assistant who recently enjoyed his first win as Blues boss yesterday.