Derby County's Chief Executive Tom Glick is to leave Pride Park.
The club has confirmed Glick has resigned from his position. He will now take up the role of chief commercial and operating officer at Manchester City. Glick joined Derby County in 2008.
In a statement, the club's board said it wished "to place on record their thanks to Tom for his hard work and dedication over the past four years."
– Andy Appleby, Derby County chairman
"Over the past few years the Board, working with the Executive Team and First Team Manager, have looked to re-structure the Club's operations and put Derby on the path towards long-term success."
"The Board will continue to embrace Derby's rich heritage and build a solid, progressive and winning Football Club on its journey forward. Financial Fair Play will change the landscape within the Championship, and the Board remain convinced that with smart management off the field and good play on it, Derby can prosper in the seasons ahead."
Derby County says it will "take the appropriate time" to find the next chief executive but confirmed Glick will stay in his post over the summer.