The explanatory essay or expository essay is used  to explain something step by step for example.
If you are going to celebrate  a job Interview  you could prepare your essay  on the following:
1) Introduction paragraph which explain what kind of professional you are going to interview and their features.
2) Second paragraph that  shows the minimum requirements to go to the next stage  of the recruitment process.
3) Â Third paragraph should explain the numbers of preliminary candidates.
Conclusions of process and results.