person who provides specific knowledge or expertise to the audit team
NOTE 1 Specific knowledge or expertise is that which relates to the organization, the process or activity to be audited, or language or culture.
NOTE 2 A technical expert does not act as an auditor in the audit team.
[ISO 9000:2005, definition 3.9.11].
Source: ISO 19011:2011 (E) – Guidelines for auditing management system. Global Standards