After the offer how long it would take to start on hamad

I have already signed the offer from hamad medical corp. It is thru IBM they said that the HR have recieved my papers, the problem is I'll be leaving in Saudi Arabia in two months time, I just want to go straight from here to Qatar, but the HR still not yet contacting me, how long it would take to contact me, do you know some person that I can email or ask regarding this matter, who is working at Hamad HR. Thank you in advance.

Topic LInked with Hamad Medical Hospital qatar