You should check out the comments from Judge Rosenstein regarding Ms. Martinez an Aerotek Employee (Account Manager, perhaps) who basically admitted to perjurying herself on the stand.
The NLRB Case number is 09-CA-075496 the link to all the documents http://www.nlrb.gov/case/09-CA-075496.
" especially noting the specificity in describing Martinez’s responses. Martinez, who initially denied in her testimony that she did not exclude former Auto Handling employees from the screening process for employment with Voith, had to grudgingly admit that she did engage in such conduct (GC Exh. 102)."
What kind of staffing company violates federal law for a contract? Not very smart.