After a brief service in the IDF, Koen relocated to Ukraine, where his first business venture was a shawarma shop at a university campus.

His wife is the founder and CEO of Jeni Coin, a jewelry company wholly owned by NY Koen Group, which has boutiques in multiple countries including Ukraine.

In 2006 he has moved to Dubai and set up a multinational holding company NY Koen Group.

[15][16] Investigation by Channel 13 News has revealed that a lawsuit was filed in 2013 mentioning Nachshon Nachshonov, according to which he had outstanding debts when he left Israel.

Koen's spokesperson said in response that "The allegations raised regarding the diamond deal have already been discussed and rejected by the court".