CNSG Knows SD-WAN Become a Partner David Hopper, our Director of Sales Engineer is our unbiased cloud expert. He makes sure our partners have the confidence to sell any SD-WAN solution to their customers. That's how CNSG is Changing the Channel. Talk to Dave Copyright © 2016. Converged Network Services Group. Our mailing address is: 11016 Rushmore Drive Suite #180 Charlotte, NC 28277