I would need to see the specifics to evaluate the chances but essentially where one or two publications might be sufficient for O-1, more are needed for EB1A.

I would need to see the specifics to evaluate the chances but essentially where one or two publications might be sufficient for O-1, more are needed for EB1A. But to be clear, a PhD is absolutely not required for an EB1A or NIW green card. It's more what a PhD typically signifies, publications, presentations, and original work.