I have a Undergrad & Master degree from US University. My H1-B was approved on Oct 2006. Currently I am working for a fortune 100 company. My employer(consulting company) is asking me if I am interested in filing Green Card. The only prior work experience I ever had in US was doing an internship for 9 months during my Undergrad. Is prior work experience a must(mandatory) to file labor under EB2 category? Any insights would be greatly appreciated. Thanks.