Animate Video for IT Product Overview

We are looking to create a short animated video with voice over, that brings to life the diagram we have already, which explains what our IT product does. We would probably only want a minute or two in length. There are bout 6 stages in the process that we want to demonstrate using 3D animated graphics, zoom in, zoom out, written words on the screen, icons, voice over and sound effects etc etc. we have someone we already use for voice overs if that helps?