About Matthew Southgate

I design infrastructure from the operator’s side of the table.

My work spans internet routing, managed IT, datacentres, voice platforms and software—giving me a practical view of how technology decisions affect service quality, support teams and business growth.

More than a consultant with a slide deck

I have spent more than two decades building and operating business-critical technology. As founder and CTO of 39D, I work across ISP infrastructure, BGP, IPv6, high availability, managed services, Microsoft platforms and VoIP.

I am particularly useful where several disciplines meet: a routing issue affecting a cloud service, a datacentre migration with voice dependencies, an MSP needing stronger network capability, or an ISP core that must become more resilient without creating unnecessary complexity.

How I work

I start by understanding the commercial outcome, operational risks and current constraints. The result may be an architecture, a technical audit, a migration plan, hands-on implementation, troubleshooting, documentation or ongoing technical leadership.

Credentials and focus

My background includes CCNA and MikroTik expertise, operation of AS34979, internet exchange and transit connectivity, datacentre networks, 3CX, FreeSWITCH, Kamailio, Microsoft infrastructure and custom software development.