From the Symantec Technical Accreditation Program on October 11th, 2011:
Designation:
Symantec Technical Specialist (STS): Symantec Data Loss Prevention v11.0
Date of Certification:
October 11, 2011
Upgraded to v11.5:
From the Symantec Technical Accreditation Program on June 8th, 2012:
Designation:
Symantec Technical Specialist (STS): Symantec Data Loss Prevention v11.5
Date of Certification:
June 8, 2012
Upgraded to 12:
From the Symantec Technical Accreditation Program on August 22nd, 2014:
Designation:
Symantec Technical Specialist (STS): Data Loss Prevention v12
Date of Certification:
August 22nd, 2014