You can find a lot using Google searches, such as:
Overseas Jobs .... or Overseas Working ... or Jobs in USA ... etc
take some time and play around with various searches as you get into the exercise.
BUT, WHATEVER YOU DO, be extremely cautious approaching any of these people. There are some exceedinly unpleasant websites out there and many of them are well disguised.
i once got a job in Thailand as a stock broker. got flown over 5* hotel then I we found out what we were doing was illegal (just conning money out of people) and me and my mate did a runner down to the southern islands and hung low. 2 days after loads of brits got put in jail for working in boiler rooms! Close escape and what an adventure. Id do it again in a heart beat.