I would have become a Mac OS 9 programmer, but there's almost no free or dirt-cheap compilation software out there for OS 9. The cheapest actual good product, I believe, was CodeWarrior education edition or something like that, and it was in the arena of $70. Nowadays, I'm either an online programmer, a Windows Java programmer, or (at some point) an Xcode programmer.
What are you working on that you need an OS 9 programmer for? What language are you working with?