Green Card on the basis of US employment

[niko888]

Hello
I am new to this group and have a question about applying for the Green Card on the basis of US employment. I am a scientific researcher and found the researcher position at US university. Can you please give me advice on Green Card application? From where I should start? How long it usually it takes to get it?
Thanks

[Usform007]

Find an attorney to review your scientific background and will tell you in which category is best for you. Usually they offer this service for free. I-140 is the first application.