Enterprise Architect - Network Infrastructure

#26-2056

London, United Kingdom

Enterprise Architect
-Network (Routing & Switching)

Expert-Level Routing, Switching & Data Center Fabric Architecture

Reports To:

Manager, ES&A

Location:

Remote / Client site as required

Travel:
Up to 30% dependent on engagement portfolio

London, United Kingdom

World Wide Technology is hiring an Enterprise Architect who is a genuine, expert-level authority on routing and switching
-someone who can design, defend, and personally troubleshoot the most demanding campus, data center, and wide-area network architectures our clients run. This role is CCIE-calibre depth.

This is a technical leadership role: the successful candidate will own the technical delivery of network architecture engagements from design through cutover, act as the final escalation point for complex routing and switching problems, and be the standard the rest of the network practice is measured against.

While routing and switching mastery is non-negotiable, WWT engagements increasingly span adjacent domains - security, AI, cloud networking, automation - and experience in these areas is a genuine advantage for career growth within the practice.

• Own end-to-end technical delivery of network architecture engagements: design authority, low-level design production, implementation oversight, and cutover/migration leadership.
• Host and chair Architecture Review Board (ARB) and Technical Design Authority (TDA) sessions for network engagements, owning governance gates, decision records, and design sign-off.
• Architect enterprise-grade routing solutions spanning BGP (iBGP/eBGP, route reflection, complex policy), OSPF, IS-IS, and EIGRP for campus, data center, and WAN environments.
• Design and validate switching architectures: VLANs, STP/RSTP/MST, VXLAN/EVPN fabrics, VPC/MLAG, and SDN-based data center fabrics (Cisco ACI, Arista Cloud Vision, Juniper Apstra).
• Lead spine-leaf data center fabric design, including underlay/overlay architecture, multi-tenancy, and fabric automation.
• Architect WAN and SD-WAN solutions (Cisco Viptela/Meraki, VMware Velo Cloud, Silver Peak, Fortinet) including MPLS integration and transport diversity strategies.
• Design QoS policies, multicast (PIM-SM/SSM), and IPv6 architectures for mission-critical environments.
• Integrate network segmentation and micro-segmentation designs with client security architecture, including zero trust network access initiatives.
• Lead client-facing technical design workshops, present architecture to network and infrastructure leadership, and act as the named technical escalation point for delivery teams.
• Mentor other network engineers and architects, and contribute to WWT's network architecture standards and reference designs.
• Support pre-sales through technical scoping, proof-of-concept design, and effort estimation for network engagements.

• 10+ years in network engineering and architecture roles, with demonstrable ownership of enterprise-scale routing and switching designs.
• Expert-level, CCIE-calibre technical depth is mandatory – CCIE (Enterprise Infrastructure, Service Provider, or Data Center) is required, or the candidate must demonstrate clearly equivalent expert-level skill through technical assessment.
• Track record leading technical delivery of multi-site or global network transformation programmes.

• BGP: iBGP and eBGP design, route reflection, confederations, complex routing policy, BGP-based multi-homing and traffic engineering.
• IGP: OSPF (multi-area design, LSA types, route summarization/filtering), IS-IS, and EIGRP where relevant to legacy environments.
• MPLS: L3
  
  VPN/L2
  
  VPN design, traffic engineering, and integration with WAN/SD-WAN overlays.
• IPv6: dual-stack and native IPv6 design and migration strategy.

• Layer 2 design: VLANs, STP/RSTP/MST tuning, loop prevention at scale.
• VXLAN/EVPN: overlay design, multi-tenancy, and interoperability across vendor fabrics.
• High availability: VPC/MLAG, stacking technologies, and fast-convergence design (BFD, sub-second failover).
• SDN fabrics: Cisco ACI, Arista Cloud Vision/EVPN-VXLAN, or Juniper Apstra – hands-on design and operations experience with at least one.
• Hands-on design experience with at least one major SD-WAN platform (Cisco Viptela/Meraki, VMware Velo Cloud, Silver Peak, Fortinet, or equivalent).
• QoS architecture across converged voice, video, and data environments.

• Experience integrating network segmentation and micro-segmentation with firewall and zero trust network architectures.
• Working knowledge of network access control (802.1X, Trust Sec, or equivalent).
• Working proficiency in Python and Ansible for network automation and configuration management.
• Experience with model-driven programmability: NETCONF/YANG, RESTCONF.
• Familiarity with streaming telemetry and gNMI-based monitoring.
• Deep, hands-on expertise across Cisco and at least one of Juniper or Arista.
• Working familiarity with…