So I realized that there were a few pictures from OMGcon that may not have shown up so well in the collages... especially this one. Engie's costume turned out very well, if I do say so myself -- which I do -- and I thought some of you might like to see that a bit closer.
No, Engie is not wearing a balaclava or face shroud. It was already pretty warm, even though we were in the coolest level of the building... Also, Engie deemed it unnecessary. 
Engineer cosplayed by

Engineer belongs to

Other pictures from OMGcon 2012:
[link]