What field are you in? The sponsoring company has to provide some evidence that they cannot fill the job with an American citizen or someone already holding a green card, in addition to spending a fair amount of money and effort to obtain the visa. Therefore, unless you have something special to offer or are in a field where there is a shortage, your chances aren't very good.

Working for a company that has offices in the US and convincing them to transfer you is one way to get a work visa.