A quick search shows PSA is currently seeking new graders. One of their bullets struck me as odd. "Sharing knowledge to help improve skill of PSA Grading Team" My first thought was they want new people to come in and help show them HOW to grade. You would think that PSA would have a training program and teach everyone how to be subjective and do it the same way everytime.
http://collectorsuniverse.com/Jobs/List/