I think you'll probably have to define the term "Preparator" a bit more, and the context of your query. Most of the museums I am familiar with have well defined divisions based upon discipline, and each division has its own technical people (titles very with division). The term "preparator" is commonly applied to vertebrate paleontology technical folk, and somewhat less so to the biological folk, but I am not aware of a museum which has a _separate_ department of "preparators" of any sort. Gregory Brown Chief Preparator, Vertebrate Paleontology University of Nebraska State Museum