Dear Rajeev,
Public HR forum is not the right place to raise this query. You should have asked this query to the Director himself. Send him draft of the appointment letter and tell him to fill in the blanks.
When the Director's son joins a company, where is the question of qualification or experience? He can join any department with or without experience. He can join any department with or without knowledge too!
Thanks,
Dinesh Divekar