Congrats on the task . Plz follow to do things after their arrival .
1. Medical test in Medical Commission which will take 2 to 4 days to get results .Cost for each passport is Qr.100/-
2. After getting results need to do finger printing for all new arrivals including children above 12 also .
3. Print their RP followup papers from MOI site after 2 to three days .
4. Proceed to immigration with followings ( for new RP )
a. RP fowllow up paper
b. Passport size pictures
c. Passport copies for new arrival with arrival date stamped page
d. Visa copies
e. Bank ÀTM card

Hope it helps ......
Good luck