Verify a credential to confirm skills and current certifications.

The list is alphabetical by last name and is updated after each testing cycle. You will see the year in which the original certification was earned as well as when recertification is due (if applicable). If the individual you are looking for is not listed, please email Customer Service at for verification.



    If you hold a GST Certification and your information does not appear to be correct, please send us an email to so that we can update your record.

    Any concerns regarding a current certification should also be promptly communicated to the address above.
    Your requests will be reviewed by the L6S Advisory Board.