As what I know;

1. You can bring her here for visit visa (1 month) if she's a relative. Otherwise, bring her here on business visa.

2. Up to 60 years old you can get here a working visa.

3. If she is your relative, you cannot sponsor her working visa. You have to seek help from some Qualified Qatari Sponsors out there. But if she is not your relative, I'm not quite sure if you can sponsor her working visa.

Definitely she can come here, through visit or business visa. Within a month from the date of coming here, she have to apply for a working visa.