Sigma Data Systems - Applicant Tracking and Test Management Software Sigma Data Systems has over 25 years of experience in the field of human resource management, applicant tracking, electronic selection and test management for government agencies. Our software products include AMS 5 and TMS 5. Contact us today at 1-800-677-1275 to find out how we can help your agency manage human resources better. Select Smarter, Select Sigma. Gosigma.com~Site InfoWhoisTrace RouteRBL Check Similar Sites: sigmatechsupport.com