[bertpursoo]

Hi,

Your task is difficult for a number of reasons:
First of all, your schools needs to have at least one certified ESL native speaker.
It is normally this person who will design the and conduct speaking tests, interviews to determine proficiency level, etc.
Finally, since you have no native speakers on staff, your school cannot really teach pronunciation, which is really necessary for teaching speaking.
I am a Certified ESL Instructor who has has worked as an academic director and ESL consultant/instructor in Asian countries.