Employee and contractor background investigation services; Security services for screening and monitoring access for third parties to land, buildings, facilities, locations and/or installations, namely, security authorization for preparation of identification cards, background investigation and research services, preparation of and providing to third parties security identification cards and electronic readers of security identification cards, providing authentication of personal identification information, and controlling of building environment access and security systems; Security services for validating the identification credentials and claimed identities of, and screening and managing access for, visitors to land, buildings, facilities and locations, namely, enabling security personnel to use electronic readers to scan and read identification credentials to validate the authenticity of the identification credentials, and check the identification credentials against lists and data sources for safety purposes and for purposes of securing and controlling visitor access; and security services for land, buildings, facilities and locations, namely, securing and controlling visitor access