I interviewed twice. Second interview was 4 months after the first one. I suppose if it doesn't happen in 6-8 months. They may not find you to be a good fit? A guess. They're picky and I believe they should be. Keep you head up man. I applied to 34 companies in 2013. Only 3 interviews. And 3 job offers. Keep applying. Keep a fine balance between bugging EAS and reminding them you're interested. They know your interested if you've already written them a few times. It is possible to over do it. Good luck.