Federal Contractor Misconduct Database

Here's an interesting database:

The government awards contracts to companies with histories of misconduct such as contract fraud and environmental, ethics, and labor violations. In the absence of a centralized federal database listing instances of misconduct, the Project On Government Oversight (POGO) is providing such data. We believe that it will lead to improved contracting decisions and public access to information about how the government spends hundreds of billions of taxpayer money each year on goods and services

You'll notice that the Defense contractors are rather well represented on the list.