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Andy Vance is an experienced Principal Network Engineer currently at DomainTools since March 2017, previously holding a similar role at Marchex for five years. Vance's extensive background includes significant positions at Zayo Group and 360 Networks, where responsibilities encompassed the design and operation of nationwide IP and Carrier Ethernet networks. Expertise includes managing advanced networking technologies from Juniper and Alcatel, providing tier III and IV support, and leading engineering teams. Earlier roles at Speakeasy and Winstar Communications further developed Vance's skills in network infrastructure design, maintenance, and troubleshooting across various environments.