The expressión closest to "par academico" is "peer evaluator / assessor". This is the right term for someone who evaluates papers for publication; "peer" implies assessing one's own academic colleagues. Here, however, it appears to refer to the evaluation of degree courses, and for this the terms "academic evaluator" or "course evaluator" are used. "Assessor" is also common as an alternative to "evaluator". I would use "academic", since it may be that the person does other forms of academic evaluation apart from the one mentioned.

"The evaluation process employs a three-member team for each course, consisting of a Course Evaluator, Academic Evaluator (subject matter expert) and Technology Evaluator. Team members are experienced in both the development and teaching of online courses." Online Course Evaluation Project, EduTools"
http://www.corning-cc.edu/future/faculty/social-sciences/sus...

Argentina's Comité Nacional de Acreditación is usually called the National Accreditation Committee in English, but "National Accreditation Board" or "National Accreditation Authority" are common expressions too. The equivalent body in the UK is called the United Kingdom Accreditation Service.

Here is a definition of "par académico" from Colombia:

"Los pares académicos son el soporte fundamental para el proceso de acreditación.
Par significa igual o semejante totalmente. En sentido estricto, el par es semejante por cuanto puede ser reconocido por los miembros de la comunidad como uno de los suyos. Pero, en el proceso de Acreditación, el «par» está encargado de emitir un juicio sobre la calidad, así que debe ser reconocido por la comunidad que lo identifica profesionalmente como alguien que posee la autoridad que le permite emitir ese juicio.
Los pares académicos tienen una tarea precisa en el proceso de Acreditación: ellos son responsables del juicio sobre la calidad en la etapa de Evaluación Externa."
http://www.cna.gov.co/1741/article-186793.html

Par académico = peer reviewer