In the IT Recruitment Industry, there are stipulations when it comes to teaming up with a well known IT staffing company. Depending on the type of position, and situation, most clients expect IT staffing firms to maintain some level of confidentiality when it comes to filling one of their IT jobs. There are a number of reasons for this, there might be someone currently in the role that is being replaced (due to performance, attitude, etc) or the client might simply not want people to know they are actively hiring.
On the other side of the hiring process are the candidates. Many IT recruiting companies keep the name of their end client confidential to prospective candidates. The reason IT staffing firms do this is to eliminate the risk of a candidate just submitting him or herself directly immediately after they get off the phone with the IT recruiter. Although most people who never do this (ultimately it would likely just hurt their chance of landing the opportunity), IT staffing companies protect themselves just in case.
Not many job seekers go straight to IT staffing agencies and a good portion of them may not even know these companies are even out there. Therefore, the IT staffing industry as a whole needs to collectively educate job seekers to reinforce the facet that IT recruiting agencies are seen as a viable means to land their next IT job.