Gus Mackay, currently operations director at County Championship rivals Leicestershire, will succeed Hugh Griffiths who steps down from the role in October.
David Green, the Sussex chairman, said: “After an exhaustive process we are delighted to have found Gus who has an excellent blend of business and cricket experience, with a background in finance and as a player for Zimbabwe. In recent times he has been a very effective administrator at Leicestershire and established a positive reputation for himself within county cricket.”
He will take on the role of CEO in October following a three-month hand over period when he will work alongside Griffiths.
English cricket club Sussex have appointed a new chief executive.
