To me these are the top 4 placement agencies. They are very good or searching what you want and need and they are efficient in whatever you are looking for no matter which side you are on, wether you are the hirer or candidate.

 

Kelly Services It breaks down what kind of job yo want (temporary, full time, etc.)

Find a Recruiter this breaks it down by what job field you are in or want to be in

Robert Half this breaks it down by job title and area you want to work in

Seek Searches what is available to the hirer. It is only what is in the site and what the employer puts on this site.