Greek Language Tutor

We are finding a Greek language turtor for my son (5 years old). We are Chinese family in Greece, living in Alimos. And we all can speak English, my son included. So I prefer the tutor can speak both of Greek and English. He has already been in kindergarden here for one year and he can understand lots of words and phrases and sentences in Greek. We want the tutor can teach him more before he goes to primary school this September. And if we coorperte very well, we will continue to cooperate all the time, especially the homework from primary school. Thank you!