No you are not too old to join CHC. I work for CHC and we have just recently employed a co-pilot of 38yrs of age. It all goes about experience more than age. Ideally you want 1000 hours TT, IR, some off shore time around 200hrs, be prepared to travel all over the world. Dont bother sending your CV in if you dont have an IR. Otherwise, my guess is you will get employed fairly quickly as a co-pilot. Industry is serious need of Helicopter Pilots.
HJ