Australian citizen want to work in USA, how? Visa Possibilities please?

[kriss07in]

Hello,
Please help with below questions:

1. I want to know how can an Australian citizen can work in USA?

2. what are visa possibilities to work in USA?

3. Can he/she(AUS CITIZEN) apply for USA citizenship?

4. What visa needed when a Australian citizen married to a H1B holder(Indian Citizen) in USA to come to USA?

5. What visa needed when a Australian citizen married to a H1B holder(Indian Citizen staying in USA) and work

in USA?

Thanks in advance.