Install,configure on sipewise

I´m looking for someone who can install and configure sipewise ([login to view URL]). Someone who have enough experience about VOIP, SIP, PBX. You sould be dedicated, serious and working transparent and clean. The sipewise will have to be configured for the moment with one phone provider with one "big" SIP Trunk and multiple channels. In the moment some 30 phone numbers. On sipewise I will generate different SIP Trunk based on the request of the client with one phone number and 2 or 3 or 8 channels. This SIP Trunk "generated" and managed by sipewise will be connected in 90% to an other PBX which the client have or in our data center or in his infrastructure. To secure the SIP Trunk we should think how will be the best solution or to offer to the client based on his possibility up to 3 ways how to connect his SIP Trunk. I would prefer in an IPSEC tunnel and with username and password... but we need to take in consideration that not all clients are able to make IPSEC or have an IT guy or what ever. So should be also possible to have it only by user name and password or what ever, here I need a good advice to have it simple and secure. In 10 percent of the cases we will connect the SIP Trunk (connection) to his webphone (zoiper) or IP desk phone. IP deskphones which we are using are Motorola, FANVIL, Yealink, Grandstream for the moment. Please contact me for more details. The clients should have access to there services, so they can administrate the sip trunk and conversations etc...