My position is not that most creationists are engineers or even that engineering predisposes one to Creationism. In fact, most engineers are not Creationists and more well-educated people are less predisposed to Creationism, the points the statistics in the study bear out. My position was that of those Creationists who presented themselves with professional credentials, or with training that they wished to represent as giving them competence to be critics of Evolution while offering Creationism as the alternative, a significant number turned out to be engineers.This should not be confused with the "hard" version of the Salem Conjecture (Hypothesis), which says that engineers are more likely to be creationists. Both versions are described in the Wikipedia entry [Salem Hypothesis].
Joshua Rosenau discusses the possibility that the hard version of the Salem Conjecture might be correct and this explains the soft version [The Salem Hypothesis explained!]. Read the comments.
[Photo Credit: I pretty sure this is a photograph of Bruce Salem.]