Comprehensive Information Services A pre-employment screening service that provides a full range of public record searches, employment and education verifications and references checks both nationally and abroad. P.O. Box 79007 Pittsburgh, Pennsylvania 15216-0007 800-537-3003 EmploymentVerificationGuide.com pages: Employment background screening checks companies - go to our homepage. Background search companies by state - find investigative search firm in your area. List of employee background screening companies - some better known services. Information - find more background screening related sources of interest to visit. Contact us - where to contact us. Site map - see a map of this web site's pages. Privacy and site use info - use of site and privacy policy issues notice. copyright © employmentverificationguide.com All rights are reserved.