Search professionals, or “headhunters” as they are called, know about “hidden postings.” While they regularly source candidates, like you, they also seek retainer or contingency relationships with potential employers. Once employers post a listing, these professionals screen information from candidates to determine those who match. Most often, search professionals deal with management or executive-level candidates and opportunities or with very specialized fields. Directories of search professionals are easy to locate in a bookstore or library, so use them.