anglais vers français Médecine Médecine : soins de santé job titles

This translation is for a web site advertising its services to French doctors who wish to come to work within the UK. The term comes within the following paragraph:

"The recent changes in the education of doctors in the UK has led to a shortfall in the number of middle grade doctors ( Registrars) and a future anticipated shortfall in Specialist doctors, such as Staff Grades, Associate Specialists and Locum Consultants. "

Thank you very much for any help you can give me in finding an appropriate equivalent.