In effect Gething Jenkins will be Peter Ridsdale's replacement but just as Chief Exec and not Chairman.
Jenkins has spent the last 6 years in a similar role at the Newport Gwent Dragons.
"As someone who grew up watching the Bluebirds from the Bob Bank, I am delighted to be joining Cardiff City," Jenkins said after his appointment was revealed.
"There are fantastic opportunities for this club over the next few years and I am looking forward to working with the directors, players and staff to build on what has already been established both from a business and sport perspective.
"Having a background in both local and international sports administration I hope to bring my experience to the club at this exciting time in its history."