Many of the computers running on government networks are left on, running at full power 24/7, yet they are only used between 5-8 hours per day. This is like leaving a 100 watt light bulb on all the time, even when no one is in the room. Simply mandate that all local IT staff enable the most efficient Energy Star settings on every computer.
Services running their own networks creates significant redundancy in circuits, data centers, servers, tech buys, etc... it also creates greater vulnerability to the DoD as a whole. DoD must adopt a single-enterpise model and manage networks at the SECDEF level.