As a permanent member of the team, you are perfectly placed to drive change in your department. This could be implementation of a change in practice, audits or delivering a new service.
PAs are also in a good position to author publications and to present cases at morbidity and mortality seminars, departmental meetings and grand rounds. As well as other professional activities, you may want to explore further education once you have finished your training. There may be an area that you want to develop more in-depth knowledge around or to acquire a new skill.
As the profession is still in its early stages, the prospects are endless. You might have to be a bit creative and think laterally but you can carve out a long and satisfying career if you have the drive to make it happen.