Carlos O'Donell <carlos at systemhalted.org> is an official FSF steward for glibc (GNU maintainer).
Also reachable via <codonell at redhat.com> and <carlos at redhat.com>
Online on IRC as patofiero, odonell, or codonell.
Carlos works on open source tools, primarily glibc, for Red Hat.
Carlos currently leads the Red Hat glibc team which is part of the Red Hat Platform Engineering Toolchain Team.