The Society of Cosmetic Chemists is probably the best organization for any cosmetic chemist to join.  It connects you with cosmetic chemists around your area, around the country and even around the world.  There are scientific conferences, a bimonthly journal of cosmetic science (peer reviewed research) and a host of chapter events every month.

Also, if you are looking for a job there are often jobs posted in the various SCC chapter newsletters.

SCC Chapters around the country

Here is a list of all the chapters and websites for the SCC around the country including 2 in Canada.