Recommendations for "Build/Release Engineer" user groups or associations?

Thank you for your assistance. I have the pleasure of recruiting for NAVTEQ in Chicago.
We're currently going through enormous growth, as we're in need of Release Engineers.

As I would like to tap into professinal association or user groups for potential candidates, can anyone offer recommendations?

Technologies utilized for our Software Release Engineer Openings:

- rational clearcase. clearquest
- subversion