Hello

I am considering moving to the States (New York preferably)in the next few months and I am currently looking at the various job options.

I am French and don't have work permit for the US yet. I have been working in London for nearly 8 years and I have been in Fundraising for nearly 5 years. I was wandering if anyone would have any tips on where to look for fundraising vacancies in the States and how easy it is to find a job.
I have been quite lucky in London and I've worked for some of the major UK charities. Would this be recognised in the New York?
Do you need a work permit before starting looking for a job or do they sponsor the right candidates?

Any help would be greatly appreciated.
Many Thanks
Sabine