The County Library is organized into service departments, under these supervisors:
| Department | Name | Phone Number |
|---|---|---|
| Director | Susan Calantone | 973-285-6934 |
| Assistant Director | Darren O’Neill | 973-285-6934 |
| Chief Librarian and Head of Readers’ Services Children’s Services |
Mary Sanders | 973-285-6970 |
| Head of Reference Music & Media ILL Periodicals |
Laurence Ross | 973-285-6969 |
| Circulation | Mark Moguin and Marissa Moguin | 973-285-6930 |
| Technical Services | Vidya Manohar | 973-285-6955 |