Look Down,
Company or Flight operations management may have restrictions in place - the Captain may not have discretion. You do not state that you are a pilot, only that you have a staff ticket - there may be both security and safety concerns that limit those eligible to be carried and then perhaps subject to veto by the Captain. There are plenty of occasions where a jump seat rider may not be advisable or appropriate.
There is certainly no right of access...
------------------
Stay Alive,
[email protected]