Role: Senior Network Architect ( Network Solutioning & Design) Role Designation: Principal Consultant Location - Amsterdam, Frankfurt, Germany, London (Any EMEA location) Role Summary We are seeking a Senior Network Architect with deep, hands-on expertise in end-to-end network solutioning across the modern enterprise stack - Software-Defined LAN, SD-WAN, SASE, application delivery (load balancing), DDI, and Software-Defined Data Center LAN. The role owns the technical design and architecture of complex, multi-vendor network solutions from concept through to detailed design and handover, translating business and security requirements into resilient, scalable, and automatable architectures.
This is a senior individual-contributor / technical-authority role that blends solution design, pre-sales/solutioning support, standards definition, and mentoring. You will be the go-to authority on network design decisions, reference architectures, and technology selection, working closely with delivery teams, security, cloud, customers, and OEM partners. The role also increasingly requires fluency in AI - both applying AI/AIOps to operate and optimize networks, and designing networks that support AI/ML workloads.
Key Responsibilities - Own the end-to-end architecture and solution design for enterprise network programs spanning campus/LAN, WAN, data center, cloud, and security-edge (SASE) domains.
- Produce High-Level Designs (HLD), Low-Level Designs (LLD), reference architectures, and design standards, including topology diagrams, IP/routing schemes, migration plans, and bill of materials.
- Lead technology evaluations, PoCs, and OEM/vendor selection, comparing solutions against functional, commercial, operational, and security criteria.
- Support pre-sales and solutioning activities - respond to RFPs/RFIs, size and cost solutions, present designs to customers and executives, and defend design decisions in technical reviews.
- Define transformation and migration strategies for legacy-to-software-defined transitions (e.g., traditional WAN → SD-WAN/SASE, classic DC → spine-leaf fabric, campus → SD-Access/fabric).
- Embed security-by-design - micro-segmentation, Zero Trust, secure edge, and integration with the broader security architecture.
- Drive network automation and Infrastructure-as-Code adoption across designs (templating, ZTP, CI/CD for network config).
- Establish design governance - architecture review boards, design patterns, guardrails, and documentation standards.
- Provide technical leadership and mentoring to network engineers and junior architects; act as design escalation point during delivery.
- Partner with cloud, security, applications, and infrastructure teams to ensure the network architecture aligns with the wider enterprise architecture and roadmaps.
Must Have Technical Skills Software-Defined LAN (Campus / SD-Access) - Deep design experience with campus fabric / SD-Access architectures (e.g., Cisco SD-Access with Catalyst/DNA Center, ISE; Aruba CX / Central / ESP fabric; Juniper Mist).
- Fabric technologies: VXLAN, LISP, EVPN, fabric overlays/underlays, group-based / policy-based segmentation.
- Wired-wireless convergence, network access control (NAC/802.1X), and identity-driven segmentation.
SD-WAN - Architecture and design across leading platforms - Cisco Catalyst SD-WAN (Viptela), Versa, VMware VeloCloud, Fortinet Secure SD-WAN, Palo Alto Prisma SD-WAN, Aruba EdgeConnect (Silver Peak).
- Core concepts: overlay/underlay design, transport independence, application-aware routing, dynamic path selection, QoS, ZTP, controller/orchestrator architecture, and hub-and-spoke vs. full-mesh topologies.
- WAN transformation and MPLS-to-internet/hybrid migration strategies.
SASE (Secure Access Service Edge) - Design of converged network-and-security-edge architectures integrating SWG, CASB, ZTNA, FWaaS, and DLP.
- Hands-on solutioning with platforms such as Zscaler (ZIA/ZPA), Palo Alto Prisma Access, Netskope, Cisco Umbrella/Secure Access, Cato Networks, Fortinet FortiSASE.
- Zero Trust Network Access design, remote/hybrid workforce connectivity, and secure branch/direct-internet-access architectures.
Load Balancing / Application Delivery (ADC) - Design and optimization with F5 BIG-IP (LTM, GTM/DNS, ASM, APM), Citrix ADC (NetScaler), A10, VMware NSX Advanced Load Balancer (Avi), HAProxy/NGINX.
- GSLB, SSL/TLS offload, health monitoring, persistence, WAF integration, and application high-availability design.
- Cloud-native load balancing (AWS ALB/NLB, Azure Load Balancer/Application Gateway, GCP LB).
DDI (DNS, DHCP, IPAM) - Enterprise DDI architecture and consolidation using Infoblox, BlueCat, EfficientIP (or equivalent).
Software-Defined Data Center LAN - Spine-leaf fabric design with Cisco ACI (APIC), VMware NSX-T/NSX, Arista (CloudVision, EVPN/VXLAN), Juniper (Apstra, QFX EVPN-VXLAN).
- Data center overlay/underlay, VXLAN-EVPN, micro-segmentation, multi-site/multi-pod, and DC interconnect (DCI).
IT/OT networks - Experience bridging enterprise IT and operational technology (OT) environments - designing converged, segmented, and secure architectures for industrial and mission-critical networks.
Cross-Cutting Foundations - Expert-level routing and switching: BGP, OSPF, IS-IS, EIGRP, MPLS, multicast, QoS, and high-availability/first-hop redundancy.
- Cloud networking across AWS / Azure / GCP - VPC/VNet design, Transit Gateway/vWAN, Direct Connect/ExpressRoute, hybrid connectivity, and cloud-to-DC integration.
- Network automation & IaC - Python, Ansible, Terraform, REST APIs, source control (Git), and CI/CD for network operations; source-of-truth tooling (e.g., NetBox).
- Observability & assurance - ServiceNOW, Remedy, Jira, Splunk, ThousandEyes, network performance monitoring, telemetry/streaming telemetry, and AIOps concepts.
- Security architecture integration - next-gen firewalls, segmentation, Zero Trust principles, and secure design patterns.
- Strong grasp of resiliency, capacity, performance, and DR design principles.
AI-Driven Network Operations & Assurance (AIOps) - Design and adoption of AIOps / AI-driven assurance platforms - e.g., Cisco AI Network Analytics (Catalyst/DNA Center), Juniper Mist AI (Marvis), Aruba Central AIOps - for anomaly detection, predictive analytics, and automated root-cause analysis.
- Applying ML-driven insights to capacity planning, performance optimization, and proactive fault prediction.
Industry Certification Highly desirable (one or more expert-level): - Cisco: CCIE / CCNP, Cisco Certified Specialist - SD-WAN, ACI
- Juniper: JNCIE / JNCIP; Aruba: ACMX / ACDX
- SASE / Security-edge: Zscaler (ZDTA/ZCCP), Palo Alto PCNSE / Prisma certifications, Netskope (NCCSA/NCCSP), Fortinet NSE 4-7
Qualifications & Experience - Experience in a network architecture / design / solutioning capacity.
- Demonstrated track record of designing and delivering large, multi-vendor, multi-domain network solutions end to end.
- Proven experience leading network transformation / modernization programs (e.g., SD-WAN, SASE, or DC fabric migrations).
- Hands-on experience in converged IT/OT environments (e.g., manufacturing, utilities, energy, oil & gas, transportation, or similar) is strongly preferred.
About Infosys Infosys is a global leader in next-generation digital services and consulting. We enable clients in 59 countries to navigate their digital transformation.
With over four decades of experience in managing the systems and workings of global enterprises, we expertly steer clients, in 59 countries, as they navigate their digital transformation powered by cloud and AI. We enable them with an AI-first core, empower the business with agile digital at scale and drive continuous improvement with always-on learning through the transfer of digital skills, expertise, and ideas from our innovation ecosystem. We are deeply committed to being a well-governed, environmentally sustainable organization where diverse talent thrives in an inclusive workplace.
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