The vast majority of gaming mathematicians are employed by manufacturers of slot machines. To break into this field all I can suggest is to let the resumes fly. It would also help to attend the Global Gaming Expo to learn more about the business. If you wish to follow in my footsteps in self-employment it will take a few years at least to build up enough business to make a living at it. Again, it would help to attend the gaming shows to drum up some business.