Northrop Grumman interview questions

Went in for a panel interview. Great group of people there. I was really dreading the panel interview however the questions related to my resume and the job were pretty straight forward. Nothing I was afraid of. The hiring manager said he would contact me in a week however I never heard back from them. I called, emailed and even emailed my HR contact and didnt receive any communication. All I was looking for was an update or no you did not get the job. I would have to say that alone was highly unprofessional in its own right however I still think they were a great group of people.