Paths toward a greencard

Hi all.
For work, I do biomedical research. Have been there a couple of years now and I'm involved in some pretty cool stuff (with clinical implications) and have become somewhat of a main member of the lab that I work at. I have heard of postdoctoral researchers getting greencards through citizenship but what are the chances for a tech who (does not have an advanced degree like PhD or Masters) of getting one? I guess is that it's almost impossible but I thought it wouldn't hurt to ask!
Thanks

I find it impossible, never have I heard this and most tech giants will not sponsor us. But if you have heard it maybe someone else here as too

I believe you are referring to the EB1 category.

http://www.workpermit.com/us/investor_eb1.htm

"5. Original, scientific, scholarly, artistic, athletic, or business-related contributions of major significance in your field. This standard is wide open. Basically, USCIS will base its judgment of your contribution on the letters of support that others in the field submit. So letters from recognized authorities in your field who consider your contributions original and significant will satisfy this requirement."

You'd still need 245(i), even if you'd be sponsored in EB-1, or EB-2 NIW.