The phrase "external examiner" refers to someone from another organization or institution who assesses and evaluates the work of students, usually in universities or colleges, to ensure fair grading and quality standards. Full definition
He is also Regional Professor of Theology at the South East Asia Graduate School of Theology in Singapore and external examiner for the Chinese University of Hong Kong. (religion-online.org)
She participated in panel discussions, as visiting critic, and as external examiner in the Netherlands. (metaphorcontemporaryart.com)
After a review of program materials (syllabi, handbooks, rubrics, and assessments) and a multiday visit to campus during which a team of external examiners interviewed faculty, students, and school personnel, NCATE found no areas of weakness and recommend approval of education programs. (unco.edu)