Hi,
I work with Devtools team who uses ci.centos.org as the build machine https://ci.centos.org/view/Devtools/
and we use Mattermost for collaboration https://chat.openshift.io
recently, we did a poc on Jenkins-mattermost plugin which posts build information into mattermost channels
so if you guys can install Jenkins-mattermost plugin on ci.centos.org we can start implementing it for our projects on ci.centos.org
thanks & regards, sgk