Your niece can only look at what options are open to her and she could start from this immi site page for Skilled Occupations List (SOL):
http://www.immi.gov.au/allforms/pdf/1121i.pdf
She may not have specific qualifications to meet the requirements for General Skilled Migration independently or sponsored as a professional or other skilled person, links on this page:
Workers - Visas & Immigration but if there are some classifications in the SOL she may want to have a look at employment sites like
SEEK - Australia's no. 1 jobs, employment, career and recruitment site,
www.onecareer.com.au and
Job Search - Australian jobs - Job listing - Find a job - CareerOne to see if there are some vacancies that may match those of SOL and what she may feel sufficiently skilled to meet position requirements.
Being prepared to contact companies with vacancies to seek any advice on a sponsorship is not going to do any harm though feedback could be limited.
There is a link for employer sponsorship also on this page:
Workers - Visas & Immigration
Next step means some investment on your niece's or her rich uncle's part in the niece being prepared to visit Australia on a tourist visa or ETA:
Visa Options - Tourists - Visitors - Visas & Immigration
Your niece has no work rights in coming as a tourist but there is nothing to stop her being prepared to visit companies to make a personal presentation to potential sponsoring employers, and it would be best to address her intent for that via an email to companies a few weeks before making a trip - short simple letter saying she is visiting Australia and would like an interview with a Personnel Manager re potential sponsorship and that she would ring on arrival in Australia to arrange a date/time if possible, Many Thanks etc..
I would not suggest that she give that as the reason for her visit if asked by Immigration people however because they would get suspicious she was going to seek immediate employment and possibly refuse her entry.
And in fact she should carry nothing with her that could indicate her intention to see companies, not even a computer disc with personal information or a companies list/contacts established from research as indicated above.
She can send herself an email with all that as an attachment and then print off her CV/Resume and any document copies etc. from an internet cafe or a public library in a Capital City, there being free computer use in many.
She could have an itinerary on visiting different cities where companies she was going to see were, as a list of cities alone is what a lot of tourists just have as an itinerary.
Before you go to all that trouble though it would help if your niece has skills in a specific area and several years experience, and the investment could provide no results at all - nothing guaranteed but if she was prepared to go to more remote cities she may have a better chance.
If her ultimate desire is to emigrate to Australia and if the above approach is not successful, she might want to relook at the SOL and see if there is any occupation she can retrain in and get some experience in India first.
Again, nothing guaranteed!
We once had a Prime Minister of Australia who is infamously remembered for two things:
. Losing his trousers in a hotel room overseas (not India)
. A statement once made "Life was not meant to be easy"
Good Luck to your niece.