Look for the individual, not the firm/agenecy (Score 1)

You'll probably have better luck finding an individual [headhunter], who has integrity and an interest in a long-term relationship than a firm.

I worked with one in particular who placed me at a Fortune 500 firm. The headhunter moved through three different agencies in the few years since. Perhaps he had too much integrity, as he's moved on to another career because the tight job market made it impossible for him to meet quota and keep his integrity.