Asterisk-Vicidial Installation

Provider must have experience with Asterisk. Project involves installing a basic VICIDIAL + Asterisk + Linux installation on 3 servers and testing it for features and load to ensure that systems are working before turning it over to our tech department. On the 4th system we want to install trixbox in a backup configuration to our current pbx. but with the features supported by trixbox. Programming experience with asterisk is a plus as we have several programming projects coming up once we have installed the current version of these solutions. We would naturally prefer a provider with experience in our environment to do these projects as well. In your bid, please be clear about your experience with Linux and asterisk platforms.