David's troubleshooting skills are phenomenal and have pulled us out of more than one bind. His knowledge of Cisco networking equipment has proven invaluable to us in our growth as a service provider. His general knowledge of network design and troubleshooting continues to be extremely useful to our organization. Generally speaking, 'These guys know their stuff'. Professionalism, patience, and courtesy are demonstrated throughout each project. I would recommend their services to anyone in need of network engineering.