I've been where you're at. What field were you thinking about getting into? It depends a lot of what you are planning on doing. In Aeronautics, for example, if you are planning on getting into design, controls, or a few other segment, you will have fairly little customer contact. The higher up engineers tend to have to explain milestones or status to the customer. I may have some conference calls here and there, but the leads tend to be the ones speaking for the people that they are responsible for. The interview was a 2 day event (1st day was speaking to various managers who were responsible for certain aspects I.e. Aerodynamics, thermodynamics, systems, etc.) I guess if you already know the segment you want, you don't have to speak to EVERYONE. Stutter or not, the managers want to see that you are excited and engaged. The interview was about 30 minutes or so. My stutter is fairly mild, so no one may have caught it, or if they did, no one mentored it. All in all, just because you stutter doesn't mean you can't get in, but you will have to work a bit harder if you want to be in a leadership (management) role. The interviewer (typically the manager) wants to see if you will be a good fit and will be able to work well with others. As a new engineer, they aren't going to expect you to start giving hour long presentations.