I've never seen anything from Eliezer that proves that he's done anything at all of value except be a rationality teacher. I know of two general criteria by which to judge someone's output in a field that I am not a part of:

1) Academic prestige (degrees, publications, etc.) and 2) Economic output (making things that people will pay money for).

Eliezer's institution doesn't sell anything, so he's a loss on part 2. He doesn't have a Ph.D or any academic papers I can find, so he's a loss on part 1, as well. Can SIAI demonstrate that it's done anything except beg for money, put up a nice-looking website, organize some symposiums, and write some very good essays?

To be honest, I'd say that his output matches the job description of "philosopher" than "engineer" or "scientist". Not that there's anything wrong with that. Many works that fall broadly under the metric of philosophy have been tremendously influential. For example, Adam Smith was a philosopher.

Eliezer seems to have talents both for seeing through confusion (and its cousin, bullshit) and for being able to explain complicated things in ways that people can understand. In other words, he'd be an amazing university professor. I just haven't seen him prove that he can do anything else.