I might be mistaken, but as per Qatari Labour law you are only supposed to work a maximum of 6 hours during Ramadan. Muslims awell as non-muslims.

 

Article (73)

The maximum ordinary working hours shall b e e ighty f our h ours per week at the rate of eight hours per day with the exception of the month of Ramadan when the maximum working hours shall be thirty six hours per month at the rate of six hours per day.