He has one. Received his Ph.D. in Physics from Vanderbilt University in 1978.
But knowing fusion and solar energy does not qualify him to make civil engineering or architectural judgments. Read the Implosion World article recommended elsewhere in this thread. It does a great job of disproving the "controlled demolition" theories.
Ah, so he does have one... I read elsewhere that he didn't. Thanks for the correction.
It says on page 11 of this report that he doesn't have a doctorate degree, so maybe he finished his dissertation but didn't pass his defense??? I'm not sure I would trust his CV to be correct.
http://www.implosionworld.com/Article-WTC9-6-06.pdf