Information on private companies (especially small companies) can be difficult to find. If the above resources don't give you good results, try:
The company or organization's website can be a good source for info on benefits, corporate culture, etc.
Look for a Careers or Human Resources section.
LinkedIn can also be a valuable resource for company information:
Oscar Rennebohm Library
959 Edgewood College Drive - Madison, WI 53711