Experienced System / Network Admin required for SmartDNS service DNS zones

I own a small SmartDNS service, and require a system / network admin in order to update the DNS zones for the streaming services I support that have since stopped working since the system was built. I also want to add some new services such as MLBtv, NFL stream pass, HBO Now, Showtime, Sling TV, Lifetime and BBC iPlayer. I will purchase subscriptions to these services that require them for testing. You should know how SmartDNS works, be familiar with SNIproxy, as well as understand what (and why) certain zones require NATs in order to work on consoles / devices. I can help test on devices, but if you already have devices of your own that will be an advantage. The devices my service supports are Mac / PC, Apple TV, FireTV, PS3 / PS4, Xbox 360 / Xbox One, iOS, Android and Roku. Only apply if you know what you're doing. This is a production environment and service, I can't have any nonsense or I will lose customers.