Working titles are often used to better describe a particular position for both internal and external audiences. For example the common classification title for a recruiter in Admissions is Admissions Counselor. But, many organizations prefer Assistant Director of Admissions because of the role they play in working directly with potential students, high schools, job fairs etc.
Departments or divisions should try to maintain a consistency of working titles to avoid confusion. Working titles have no bearing on classification levels.
Working titles can be used on job postings, in advertising, on business cards, on resumes and on correspondence unless directed otherwise by a supervisor.