Foreigner getting a job in the US

I just wanted to know how hard it would be for me to get any science related job in California since I'm a russian girl and just recently graduated from a russian university studying petroleum engineering. I'll move to the LA with a green card pretty soon and will want to work in a chemistry related field.

usa jobs
usa jobs resume
usa hotel jobs
usajobs
usa jobs federal government
usa job in ksa
usa jobs
usa jobs login
usa jobs gov
usajobs.gov
www.usajobs.gov
usajobs.com
usajobs
usajobs.gov official