How to apply to work at HK International School

My friend who will be back to HK from US , she would like to work as a teacher at HK Int'l school .
Any friends can advise her how to apply .
She is a Chinese lady , born at US , can speak Cantonese , but cannot read or write .

Her education history as below:
New York University -- Bachelor of Science Deegree in Childhood and Special Educationh Minor in Psychology
New York University in London -- London , England
Courses in art , architecture , social and developmental psychology .
She can play piano and violin well and she is a student Teacher at New York .

She do have a HKID .

If any friend can advise , please inform me .
Thanks

JHmami