To my understanding all positions related to HMC need to be checked by the health council and the interested persons undergo a registration process and then a set of evaluations to asses their experience as well as to validate their documents and then make them able to work here.

Visit the Supreme Council of Health (either in person or via internet) to gather as much info as possible

Check the link

http://www.sch.gov.qa/sch/En/

Regards!!