When addressing the past positions in a resume, although titles somewhat describes the role, they cannot clarify the importance of positions.
For example, listing a past position of
department chair indicates administrative duties at department level, but it depends on the department. Definitely, chairing a small department with a few faculty members and annual enrollment of 30 undergraduate students is different from a well-funded department with tens of senior faculty members and several PhD programs. However, if a reader does not know that specific department, the term
department chair is the same.
This is even more serious when it comes to differences in terminology. In a university, a faculty can be equal to a department, and somewhere else a faculty can be in the size of a university hosting several large departments. Even terms of mid-level administrative positions in academia do not always have the same meaning: e.g., dean, director, chair, head.
How do you fairly clarify the importance of the job you had?
It is possible to add a description, but as it is not very common, it may cause an impression of overestimation.