What represents employer to prospective applicants at colleges and job fair?

Recruiters

Explanation:

In order to obtain promising employees from colleges, companies can form a team of recruiters to give introduction about the company  and attract interest from fresh graduates. (most colleges will set aside a specific day for such events)

These recruiters tend to be a mixture of Human resources team along with  new low-level employees that can share their personal experience to the potential applicants.

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