I currently run and manage over 50 remote Asterisk PBX Servers with different custom dial plans and versions of Asterisk per system. I am upgrading them to current Asterisk builds frequently as new features and options are needed. I have to migrate the dial plans along with the upgrades. I also run a hosted Asterisk platform for single owner businesses and small businesses. I have installed Asterisk on Xenserver, VMWare, and other Virtual Host Systems. I am very familiar with Linux and the needs it has running in a virtual environment. I always do backups and make sure I can role back without any issues if something comes up that isn't anticipated. I can work after hours as not to interfere with your daily usage of the server. I am very familiar with most SIP phones, specifically Polycom, Grandstream, Aastra, Cisco. I am new to freelancer but have done a lot of contract work outside of this site. As I mentioned before I have clients that do a wide range of things with Asterisk. I can provide references if need be. Please feel free to contact me with questions. Thanks for your time reading this.