Like many jobs people get, sometimes the opportunities just come up out of the blue.
I'm retired, and was approached by an acquaintance, now a good mate, who invited me to do some part time work for him as a tour guide.
Rail history is my hobby, and Scott runs tours of countries where all travel, where possible, is done by rail. He needed a Swiss expert, and I just happen to know a bit about Swiss trains. So, I wound up hosting two tours a year around the Alps by train.
I go there in April and September. They are good times to travel, because it's outside the peak tourist seasons - so no crowds. I also host a tour of Outback Qld, going out to the dinosaur sites at Winton, and riding the classic Guflander and Savannahlander trains - both of which will test the fillings in your teeth.
In March I take people around Tasmania to look at the remnants of railways down there. I was doing two tours a year of Japan, but at 71, I need to slow down a bit -and the long haul flights are mind numbingly boring. The money's good, though.
If you want advice on Switzerland, I'm very happy to help you.