My job basically revolves around increasing transparency, accountability, dialogue and trust between the Wikimedia Foundation engineering staff and the rest of the Wikimedia movement, and facilitating communication with the general public.
Disclaimer: My work involves interacting with the Wikimedia community and using Wikimedia wikis for documentation. However, unless otherwise stated, any edit to Wikimedia projects by myself is a reversible act of a regular member of the community, not a legal or official action.
The best way to contact me is to send me an e-mail at gpaumierwikimedia.org.
If it's urgent, I'm usually connected to Freenode IRC as guillom, molliug or basile when I'm away.