Hi Gorkhali, There are three groups within EB1: those with international awards, etc. (like Nobel Prize or lesser but highly competitive prizes in your field); outstanding professor/researcher (usually with tenure track job with a research university or research organization; and then the national interest waiver in which case you have to demonstrate that your staying in this country will benefit the US in significant ways. To file under any of these categories of EB1, you have to have a Ph.D., a few good publications in reputed journals in your field and 5-10 strong recommendation letters from highly reputed scholars in your field. Some awards and membership in professional organization also helps. Getting letters from top researchers and documenting all your achievements (including publications) can be a bit hassle but, hey, it's worth it. You can apply without a job offer if your other credentials are strong, but if you have an offer that'll sweeten things. You can actually find helpful info on www.murthy.com or even the USCIS home page by following the links on permanent residency/green card. Best of luck.