The interview process is extensive. You should be prepared to interview with engineers and technical team members before you get to the hiring manager for your position.
Building rapport and being able to communicate are two extremely valuable skills to have when interviewing with Verizon Terremark.
After you interview with multiple team members, you will meet with either the recruiter or the hiring manager for the position. If you are passed you'll know quickly from the HR recruiter. If you are on the way to being hired, you will receive an offer letter.
My best advice after the interview is to stick to your salary request. If you're being reasonable for what the market offers in the DFW metroplex you will receive the offer, but you must present 2-3 valid reasons for your salary requirement. While I haven't had personal experience, I have been told that HR receives bonus compensation based on staying beneath a threshold for positions and new hires.