After seven years at the helm, Marsh, who helped launched the company in London in 2010, will “move on to new opportunities” on September 15.
AccorHotels announced the acquisition of the Airbnb rival in April for €148 million and today onefinestay employs more than 700 people and has offices in London, New York, Paris, Los Angeles, Rome, Sydney and Miami.
Marsh will continue to support the business on an advisory basis for the coming months.
He said: “I am more than confident about the future of onefinestay.
“AccorHotels is a natural partner and a strong advocate for the potential of our business model.
“It has been the greatest privilege to work with the fantastically talented team which has made onefinestay so successful.
“AccorHotels has a clear vision for how it wants to build the business in the next phase of its development, and I have full confidence in the management team I leave behind me to fulfil that vision.”
Sébastien Bazin, chief executive of AccorHotels, added: “Greg has done an extraordinary job as chief executive over the last seven years, devising and creating a brand recognised for innovation and service excellence, and scaling the business into five international markets.
“We are grateful for his continued support through the transition period. We are committed to building on Greg’s work over the coming months and years, to deliver on our distinctive vision for how onefinestay can define and dominate its category.”
Evan Frank has been appointed chief executive of onefinestay and Keyvan Nilforoushan named deputy chief executive.
Frank will report to Steven Daines, chief executive HotelServices northern Europe and Russia and member of AccorHotels’ executive committee, who will be chairman of onefinestay.
Marsh continued: “I’m delighted to see Evan take the reins.
“Having worked closely with him since the start of onefinestay, there is nobody better equipped to lead the business in the next phase of its growth.”