In IELTS program you must qualify and fulfill all the following requirements:
1. One must be a UG graduate or have a qualification which compensates the UG qualification.
2. TEFL/ TESOL qualification from a recognized organization.
3. Relevant teaching experience. Teaching experience should be for the students above the age of 16.
Later there is a whole list of Examiner system which you will be familiarised after you qualify the initial selection.