Why do you believe we need security, here?

The interviewer wants to see how observant you are when it comes to their needs. If you are interviewing for a direct security job, take a scan of what you believe the requirements to be when you arrive at your interview.

If you are interviewing with an agency that contracts you out to a variety of jobs, this answer will be positioned a bit differently. In this circumstance, talk about their top clients, and what those clients' security needs may be.

"I believe that the clients who outsource your security guards are ones who have temporary needs. These needs include events, high peak times, or seasonal work, when hiring a full-time team member would not make sense. I have worked as a full-time dedicated officer, and as a contracted security officer. I am open to either situation and can adapt to a variety of needs and scenarios."