ISP & BGP consulting
Core network design, routing policy, internet exchanges, transit, RPKI, IPv6, traffic engineering and incident recovery.
Explore ISP consulting →Independent technical leadership for complex infrastructure
Networks that keep working when the easy answers stop.
I help ISPs, MSPs and ambitious organisations design, repair and scale BGP, IPv6, high-availability, datacentre and VoIP platforms.
- 20+ years in ISP and network operations
- Operator experience with AS34979
- Essex-based, working across the UK and Europe
BGPIPv6MikroTikHigh AvailabilityVoIPDatacentres
Where I add value
Technical depth with commercial awareness.
I work on the infrastructure behind the service: the routing, resilience, security, monitoring and operational decisions that protect revenue and reputation.
High availability
Dual-router architecture, VRRP, OSPF, BFD, multi-site connectivity, failure testing and operational runbooks.
Explore resilience work →VoIP & carrier platforms
3CX trunks, Kamailio, FreeSWITCH, SIP security, carrier routing, LCR, billing and multi-site disaster recovery.
Explore VoIP consulting →Built by an operator
Advice grounded in systems that carry real traffic.
I am the founder and CTO behind 39D, combining managed IT, ISP, datacentre, voice and software experience. That means recommendations are shaped by real operational constraints—not just diagrams.
More about my experience →Featured work
Projects that show the engineering.
ISP Core Network Blueprint
A documented dual-router architecture covering internet exchanges, transit, routing security, customer sessions and fast failover.
View project →Highly Available VoIP Cluster
Kamailio, FreeSWITCH and MariaDB Galera for resilient SIP services and carrier routing.
View project →Network Observability Platform
Syslog, SNMP and BGP visibility for engineers, service teams and customer portals.
View project →Complex network problem?
Bring me in before the next outage, migration or scaling limit.
Projects are typically scoped for organisations that need specialist expertise, independent review or hands-on delivery.