I’m a Linux kernel developer for IBM’s Linux Technology Center.
We work on Linux support for IBM POWER processors.
There's more work-related information on my LinkedIn profile.
Since we're using buildroot for the OpenPower firmware build infrastructure, it's relatively straightforward to generate a standalone toolchain to build add-ons to the petitboot environment. This toolchain will allow you to cross-compile from your build host to an OpenPower host running the petitboot environment.