Ebert worked as a senior specialist at consultancy brand Bain & Company.
In a statement, the company said: “We are shocked to read reports of a tragic accident in Greece regarding one of our colleagues and her husband.
“Our thoughts and support are with the families involved at this very difficult time.”
A senior police official told the Times that the crash came just before the helicopter’s scheduled landing time of 18:15 local time (16:15 GMT).
Sifnos’ Deputy Mayor, Manolis Foundoulakis, arrived at the scene shortly after the incident and told local news site Newsit there was almost “nothing left” of the aircraft.
He said locals saw the helicopter crash within metres of their homes and had described a “bizarre engine noise coming from the aircraft” as it was about to land.