Hello,
I am a pest risk assessor with the Canadian Food Inspection Agency. As one can guess from its name, this Agency (a branch of the Canadian Government) is chiefly concerned with food safety, but is also the national plant protection organization for Canada, as well as being in charge of animal health, similar to the New Zealand Ministry for Primary Industries as described by Melanie. I specialize in risk assessments for insect, mollusc and mite pests, and am in a team of 4 such risk assessors. Another four work on pathology risk assessments, another four on botanical (weed) risk assessments, and there is also a group that consider the risks of GMOs.
Here’s the CFIA home page URL: http://www.inspection.gc.ca/eng/1297964599443/1297965645317
We do not (yet) publish our risk assessments, but they can be requested.