Yes, you can add any logo or graphical treatment to the top of every page in the Fuze Suite. Furthermore, you can have a different graphic display on the external pages (those seen by customers/members) and on the internal pages (those seen by your internal staff).
It is easily done in the Style Options page under the Admin tab of the Fuze Suite. To do so you must have administrative privileges. The Fuze Suite provides extensive online help to assist you in making changes like these.