You may see a number of healthcare professionals on your way to a hospital emergency department and while you're there. The first might be paramedics, who will arrive in an ambulance to assess your condition if you have a medical emergency or serious accident.
A triage nurse will then usually assess your condition upon arrival and you will then be seen by an appropriate healthcare professional such as a doctor, nurse, pharmacist or physio. If you're sent for tests you might meet technicians such as a sonographers or radiographers. There will also be a number of other support staff in the emergency department.