How are recruiters different from employment agencies and retained search firms?
Recruiters work for you and employment agencies work for job hunters. Retained search firms are similar to recruiters, but generally accept only top-level assignments (chief executive officers or other corporate-level management, for example). Retained search firms might specialize in a particular industry, but usually they are generalists. Most search firms require a non-refundable retainer, plus the placement fee if you hire one of their candidates.