As well as belonging to a region, members can elect to join a Special Interest Group (SIG).
There are nationally-based SIGs for EHPs working in Port Health and the Commercial and Independent sectors.
Members interested in international environmental health may want to join the International Special Interest Group.
Any 50 members can petition the CIEH Council for the establishment of a SIG covering their particular area of interest.
Petitioners are required to demonstrate that their needs cannot be met adequately at a regional level.