I'm a front office engineer at a prop firm -- always interesting to get insight into how others do it.
We have fairly similar parallels, maybe with the exception of throwing new exchange connections to the dedicated networking group.
Always love watching their incident responses from afar (usually while getting impacted desks to put away the pitchforks). Great examples of crisis management, effectiveness and prioritization under pressure, ... All while being extremely pragmatic about actual vs perceived risk.
(I'm sure joining KCG in August of 2012 was a wild time...)