Hi,
It depends on which area of business /work your organization comes under.
For ex. Schools, Banks and most govt organizations begin and finish early. Typical timing would be 7.00 am - 2.00 pm.

A trading organization may opt for Split Shifts :- 8 am to 1.00 pm and 4.PM to 7.00 pm.

Many organizations prefer a straight shift - 8.30 am to 5.30 Pm with a break for lunch.

Work Timing in most cases is NOT NEGOTIABLE. But I know a few expats who have negotiated even working hours.

All the best and welcome to Qatar if you do join this firm/organization.

Live life to the fullest

MARK