Find experts in the specific areas of life-sciences, including chemistry, biology and medicine. (Site pulls its data by analyzing articles and authors in PubMed.) Still under development.
The info is provided by the individuals listed in the directory and is not independently verified. However, many experts and authors list themselves and do so accurately.
State, city, county government web sites are collected here.
Associations
Industry and trade associations can be valuable sources of expertise. As always, keep the viewpoint of the association in mind, but usually the association can provide facts, figures, or refer you to someone who can help.