architect is not listed.....but your sister may try to apply for the visa throgh the Qatar Embassy there in the UAE....

Listed professions are as follows:

Trader/businessperson, investor, partner
Commercial broker
Auditor, accountant, finance services officer, banker
Marketing executive, salesperson, quality supervisor
Pilot, cabin crew, flight attendant, flight director, aircraft technician
Manager of any kind
Ship crew
Engineer
Lawyer, legal advisor, judge
Doctor, psychologist, general health care specialist, pharmacist, medical consultant
Artist, actor
Journalist, announcer, public relations officer
Diplomat
University professor, special needs teacher
Computer programmer, program designer, IT analyst
Physicist, chemist, geologist, agricultural specialist