Almost everybody, at every level who interviews is at least a little bit nervous. It’s a stressful situation. Always keep in mind that at some point, the person who is interviewing you was on your side of the table. So yes, its perfectly okay to be a little nervous. But…you can’t be too nervous. If you sweat profusely or have trouble speaking without nervous stuttering then that’s a problem. To a large extent, interviewing skills are similar to the types of skills you will need to speak to (pitch, perhaps) or be questioned by a client. Therefore, being too nervous will get held against you as it may be a sign that you won’t be able to be put in front of a client. The more practice you have interviewing, the more comfortable you will be.