Northrop Grumman hosts 2-3 large job fairs every year. An alumni from my graduate program invited me to one of the job fairs. The job fair has many groups within the company looking for candidates to work on their projects so it is in your best interest to open many important looking people since impressing them lands you interviews. Beware of functional managers performing the interviews because you're likely going to be placed on a bad project where no one wants to work. If the team lead is not present at the interview, he or she is usually a jerk and no one wants to work for him or her. That is why the functional manager is performing the interview; the functional can seem nice but place you on a horrible project desperate for people because no one is willing to deal with the team lead. This happened to me.