I've been out to parties two nights in a row, and now I can get back to business. I got a response from some one who dabbles with Speleology. Now, things have been clarified, in Australia, people who study caves and Speleology aren't Speleologists. They are Biologists, Microbiologists, Palaeontologists, Archaeologists, Geologists, Hydrologists, Physicists, Chemists, Pharmacologists, Medical specialists, etc.... He also told me Speleology is more of a non profit hobby, and not a full time professional job. This makes thing easier, I first thought I'd have to change heaps about my character, in order to make him a Speleologist, rather than a Geologist, just maybe a couple of sentences here and there to make things stick and I think I'll be fine. I know have a contact in the field so if I have any further question I can contact him.