He's now the Director of the "Managing the Atom" project at the Kennedy School of Government at Harvard University.
He's, I'm guessing, in his 30s.
He has a blog.
Hersh makes mistakes of fact and logic in his article, which Dr Lewis describes there: http://www.ArmsControlWonk.com/1030/we-are-not-going-to-nuke-iran
ArmsControlWonk blog has a good archive sorted by topic here:
http://www.armscontrolwonk.com/?s=archive