First, talking about Blackwater, it's very important for our shareholders to understand that we compete with Blackwater in a very narrow field that currently represents 2% of our revenue -- I want to repeat that -- 2% of our revenue. So when you compare us to Blackwater, 2% of our revenue is on the same basis as Blackwater.
Unfortunately, it's very visible work that tends to attract a disproportionate amount of attention that I believe unfairly distorts the image of DynCorp. I don't need to tell you what kind of work we do or how long we've been at it, because I realize all of you understand and know that. But I do want you to know that in this narrow space in which we compete with Blackwater, we believe we are a very different company.
For example, we are highly selective in our hiring practices. We operate very, disciplined security teams. We enforce a strict, no-alcohol policy, strict no-alcohol -- not eight hours prior to going up on a work assignment, but no alcohol period.
And we've developed our own rules for the use of force that are more detailed than those issued by the U.S. government. In fact, our rules for the use of force are based on the most conservative elements of the three sets of rules in effect in Iraq.
And let me just take a moment to explain a couple of these points that are off from my prepared remarks. On the selection process, roughly 50% to 65% of the people that we interview in this protection area are declined for employees either because of background checks, physical exams or lack of experience. An additional 15% are rejected because they don't pass our psychological tests.
We're not in the game of firing people after we hire them. We're in the game of being selective in hiring the right people upfront. That is a really important distinction.
When you look for the rules for the use of force or rules of engagement in Iraq, there really are three sets of rules. And I think in recent Blackwater testimony, when asked, the person who was testifying said, "Well, we follow the rules of force -- rules for the use of force in Iraq." Well, there's three of them. Which one do you follow? All three are not the same.