Qualified Security Assessor ( QSA ) is a designation conferred by the PCI Security Standards Council To Those Individuals That meet specific information security education requirements,-have taken the Appropriate training from the PCI Security Standards Council, are employees of a Qualified Security Assessor (QSA) company PCI security and auditing firm,  and will be performing PCI compliance assessments as they relate to the protection of credit card data.
The QSA term can be implied to Identify an individual qualified to perform payment card industry compliance auditing and consulting firm the gold Itself. QSA companies are sometimes differentiated from QSA individuals by the initialism ‘QSAC’. 
The PCI Data Security Standard (PCI DSS) is a PCI Data Security Standard (PCI DSS) .
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- Jump up^ “Become a Qualified Security Assessor (QSA)” . Www.pcisecuritystandards.org . Retrieved 2015-06-04 .