In my experience (Canadian government IT) if there is racism preventing black people getting jobs, it is happening before the job application process.
I am a programmer working in an IT section with about 75 employees, and we do not have a single black person currently employed. And this is government, where being any official minority gives you a leg up on everyone else in the pool. We had a black testing consultant a several years back, and last year we had a black student. But otherwise we have many whites, asians, indians, and misc, all of varying qualities. In university (in the same city) my classrooms were a similar mix, also with very few black people. Of the black people I've encountered that work in this organization, almost all of them are on the business policy side, which usually means they are PhD's (veterinarians).