School for an O level student

Dear all AOA
In three weeks time I will be moving to Riyadh with my son, my wife is already in Riyadh. I am concerned about the education of my 15 year old boy who has to be in a school in O levels Cambridge curriculum. I have gone through the forum already and know that we cant afford the British school. Also as my wife's work place would be at King Saud Medical City kindly suggest me schools closer to the work place.
Thanks in advance

Ramadan Kareem and hope you arrive safely.
You can check Pakistan Int. School - English Section for admission of your son.
pisesriyadh. com /index. php/about-us

Thanks Ehtesham for your valuable advice I will defiantly try the Pakistani school but I have heard that they don't take new students and only take students whose siblings are studying in the school. Kindly suggest some more schools.