When asked to supply a biography for conferences and talks, I typically use the following text:
Paul Moore has been involved in various Linux security efforts since 2004 at Hewlett-Packard, Red Hat, and Cisco. He currently maintains the SELinux, audit, and labeled networking subsystems in the Linux Kernel as well as the libseccomp userspace library.
When working on Open Source projects it is often convenient to have your own domain for employer agnostic email and self-hosting of various things (blogs, presentations, files, etc.).