My name is Jason Derr -- I manage my own business where I provide VOIP services to my customers. I have been doing this for 15 years. I manage 35 + FreePBX servers and a FusionPBX server. I built everyone one of them - and configured hundreds of IP phones.
I manage 10 servers in a DC - and have my own SIP server that I have developed which all my customer PBX's trunk to.
I am 51 years old - and I do this not only as a career but also because I thoroughly enjoy it.