Moving to the USA can be quite a complicated process but it isn't necessarily impossible. Start by having a look at our Visas for the USA page.
Finding a job in the USA is not as easy as it once was as a result of the recession there are now fewer vacancies in general. To find out more about the job market in the US have a read of the Working in the USA page.
You can also contact recruitment agencies and ask for their advice on you job prospects. They will have a more in-depth knowledge about specific job markets and give you a better idea of your prospects and link you up with potential employers.
If you have got any contacts in the US, working in similar fields to you then do try to tap into their networks as well. Often networking and knowing the right people helps you the most when it comes to finding a job in a new country.