He succeeds Rooney Anand, who has stepped down from the role after 14 years with the company to become chairman of Casual Dining Group.
Mackenzie joins the company from Merlin Entertainments, where he was a member of the executive committee responsible for attractions such as the London Eye, Madame Tussauds and Sea Life aquariums. Prior to this, he served as development director for Burger King in the UK and Ireland.
‘The best candidate’
Commenting on the appointment, Greene King chairman Philip Yea said: “After a comprehensive search, we feel that Nick’s broad experience and track record at one of the world’s leading leisure businesses, as well as his knowledge of the pub business both early in his career and more recently as a non-executive, make him the best candidate to lead Greene King through its next phase.
“We are looking forward to Nick taking up his role when Rooney steps down at the end of the current financial year.”
Mackenzie is also currently an independent non-executive director of Daniel Thwaites, a role he will be relinquishing before taking up his executive role at Greene King.
He added: “Greene King is a very strong business with a great portfolio of pubs and beer brands and a real commitment to its customers, staff and shareholders.
“I am looking forward to working with my new colleagues to deliver on our vision to be the best pub company and brewer in Britain.”
Meanwhile, online retailer MuscleFood has appointed former Shop Direct deputy CEO Gareth Jones as chief executive officer.
MuscleFood founder Darren Beale, who led the search for a new CEO, is to move into a part-time, non-executive advisory capacity once the handover has been completed.