Ok guys, the simple truth to this is that unless you are a US citizen or permanent resident you will not be allowed to work in the US of A. Yes there is a employer sponsored program (H1B visa etc…) but it does not apply to helicopter pilots it is intended to bring IT, medical, and education professionals (to name a few) to the States.
The process to obtain such a work visa/permit is rather lengthy, painful and not to forget expensive. I doubt a company would go through this if they have stacks of resumes from highly qualified US pilots on their desk.
Yes, there are “foreigners” flying for US companies, but trust me they are either permanent residents also called green card holders or US citizens. I’ve never met anyone on a employer sponsored work visa in my ten years in the industry.