Among the company's pilot projects was deploying PC power management software from 1E on more than 4,000 PCs. The effort helps reduce energy waste by powering down machines when they aren't in use.

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Additionally, the company launched a server virtualization and consolidation effort for its Windows and Unix environments, as well as for its Oracle and Microsoft database servers. The company reports that more than 685 servers have already been virtualized or consolidated.

On top of that, Raytheon started a printer- and paper-reduction campaign through which more than 3,900 personal printers in the pilot businesses were slated for removal. "These printers were often removed without replacement, because of the existing widespread use of multifunction printing devices on the network," says Maureen O'Donnell, internal controls manager for information solutions at Raytheon's Network Centric Systems business unit.

In addition, the printer default settings were changed to double-sided, secure printing, which significantly reduced paper and ink consumption.

Moreover, Raytheon adopted to new IT practices to reduce its environmental impact. For example, a revised IT-procurement process incorporates energy and recyclability criteria into product-purchase decisions and sustainability criteria into supplier evaluations.

[ Ecofriendlier hardware comes with a higher price tag. InfoWorld investigates: Is it worth the cost? ]

The project focused not only on deploying an array of green technologies but also on driving the necessary cultural change within the Raytheon's six business units to steer employees toward making greener decisions. In fact, the biggest challenge hasn't been so much technological as cultural, says O'Donnell.

In an effort to foster a green mindset among employees, IT partnered with the facilities department to drive a communications campaign via e-mail, site events, and an Energy Citizen Program, which encourages employees to practice energy efficiency at work and at home. "This helped the employee population understand the impact of the IT footprint on Raytheon and how, through simple practices, employees could contribute significantly to the company's sustainability strategy," says O'Donnell.

[ Learn how companies such as Yahoo empower users to be greener. ]