Lisa,
Is there a specific job title for this specific position yet? consultant? Assistant? you could resort to our salaries section on bayt.com to find out approximately what the salary range would be for your specific job in Qatar (or a similar job): http://www.bayt.com/salaries . Just bear in mind accommodation, transportation and day to day expenses should be taken into consideration when you re negotiating for your salary- also annual ticket to your homecountry , performance appraisal schemes, annual bonuses schemes, annual vacation days, etc.. make sure you have a clear and written confirmation regarding all the above.
hope this helps - Good luck!!