FreePBX/Asterisk Admin

We are a VOIP provider that uses FreePBX/Asterisk for our customers. Looking for a long-term relationship. Prefer someone in the USA, with USA schedule, whom has excellent verbal skills and can speak English. Right candidate will be able to make changes on the fly, as needed, and may be asked to contact our customers to work with them directly from time to time. Responsible for all PBX functions, updates, new DID/accounts, build provision server, provision phones remotely, assist with outages, etc.

This is an as-needed basis with potentially 10 hours/mo and a couple projects to build provisioning server, web page for customers to modify certain settings, etc.