I've had contact with independent recruiters in two situations:
Situation 1 - A recruiter contacted me (unsolicited), asking if I would be interested in a "great new opportunity".
Situation 2 - A recruiter contacted me (again unsolicited) because there was a job posting where I worked and they had "the perfect" candidate.
In situation 1, the one time I said yes out of curiosity, they would not tell me which company or the location of the company when I asked. Instead, they asked if I'd be willing to have a phone call with someone at the company of the "great new opportunity". I did, and it turned out that the position, although an interesting one, wasn't even in my area and I would have needed to relocate (which was a dealbreaker for me at the time). It was a gigantic waste of time.
In situation 2, the deal was that the firm where I worked would pay the recruiter something like 10% of the new hire's salary if the recruiter brought us a candidate who was hired. This was cost prohibitive, and I expect it would be for many firms unless they were either large or had a critical need.
There are some engineering companies that have a reputation for working employees as much as possible, resulting in very high burnout and turnover rates. In my area, it seems like these are the sorts of companies are the ones most often using recruiters.
So, in my opinion, using recruiters should be approached with caution. If you are job hunting, you are much better off figuring out where you want to work and being proactive in contacting people there to find out about potential jobs. Do your own legwork, set up meetings with people there, and negotiate a higher starting salary or better benefits (since no one had to pay for a recruiter).
In talking with other engineers over the years, the few that admitted to having been contacted by a recruiter also had a negative experience. I am curious to hear if anyone has had a positive experience with one.
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Stephanie Slocum PE, MASCE
Founder
Engineers Rising LLC
www.engineersrising.com------------------------------