Faculty members may recruit postdoctoral scholars directly by whatever method they deem appropriate, e.g. personal contacts, response to inquiries, advertisements in local, national or international press. If you would like to get in touch with a researcher at Western who shares your research interests, you may contact an academic department directly.
The best time for a postdoc to evaluate a potential postdoctoral position is before signing on. It is difficult to adjust the major conditions of an appointment once it is underway. Experienced postdocs and faculty mentors suggest the following questions be asked of (and about) a prospective mentor:
Excerpt from "Enhancing the Postdoctoral Experience for Scientists and Engineering, A Guide for Postdoctoral Scholars, Advisers, Institutions, Funding Organizations, and Disciplinary Societies," National Academy Press, Washington, DC.
The complete guide can be found here.