Senior IT Infrastructure Engineer (network)

Job description

**Job ID - 36501** Function - DIO Job location - Gurgaon/Bangalore Job Type - Permanent **Why we need this role** We are seeking a Senior IT Infrastructure Engineer (Network) to act as a technical Subject Matter Expert (SME) across enterprise network services, supporting office, data centre, and hybrid cloud networking environments. This is a hands-on engineering role focused on delivering resilient, secure-by-design, and high-performance network platforms using predominantly Cisco technologies, with exposure to Juniper and cloud-native networking. The role will be critical in ensuring network segmentation, security, and scalability across the organisation’s global infrastructure **What You Will Do** Act as a technical SME for network infrastructure, including: Office / campus networks, Data centre networking, Hybrid cloud connectivity (Azure, GCP) **Design, Implement, And Support Secure, Scalable Network Solutions Across** LAN / WAN / Data Centre / Cloud **Own And Optimise Cisco-based Network Platforms, Including** Routing and switching, Cisco ACI (Application Centric Infrastructure), Policy-driven segmentation **Support And Manage F5 Load Balancing Platforms, Including** LTM configuration and optimisation, Traffic management and application delivery, High availability and failover design **Deliver Secure-by-design Network Architecture, Including** Network segmentation and micro-segmentation, Zero Trust principles, Alignment to enterprise security controls **Design And Support Hybrid Networking Solutions, Including** Connectivity to Azure and GCP VPN and private connectivity models (e.g. ExpressRoute, Interconnect) Troubleshoot and resolve complex network incidents and performance issues across multi-layer environments Drive network automation and standardisation to improve operational efficiency **Produce And Maintain High-quality Network Documentation, Including** High-level and low-level designs, Network diagrams, Runbooks and operational procedures, Configuration standards **Collaborate With** Security teams (segmentation, network security controls) Cloud engineering teams Platform and infrastructure teams Participate in the on-call rota to support critical network incidents **What We're Looking For** Required Skills & Experience **Strong Hands-on Experience With** Cisco networking technologies (core requirement) Data centre networking and Cisco ACI F5 load balancing platforms **Experience With** Juniper networking technologies (desirable) Hybrid cloud networking (Azure and/or GCP) **Deep Knowledge Of** Network segmentation and secure network design Routing and switching protocols (e.g. BGP, OSPF) Layer 4–7 load balancing concepts High availability and resilient design Proven ability to design, implement, and support enterprise-scale network environments **Strong Troubleshooting Experience Across** LAN WAN Data centre fabric Hybrid cloud connectivity Shape ✅ Technical Competencies Recognised as a network SME within the team Ability to lead complex technical delivery and problem resolution independently **Strong Understanding Of** Secure-by-design networking Network segmentation strategies (macro and micro segmentation) High availability, resilience, and fault tolerance Hands-on experience implementing and operating Cisco ACI environments Ability to contribute to design decisions in partnership with architecture teams ✅ Behavioural & Professional Skills Ownership & Accountability: Takes responsibility for network stability, performance, and security Technical Leadership: Influences engineering standards and solutions without direct line management Security Focus: Embeds secure-by-design principles into all network solutions Collaboration: Works effectively across infrastructure, security, and cloud teams Communication: Clearly articulates technical concepts and designs Continuous Improvement: Drives optimisation, automation, and simplification initiatives **✅ Preferred Qualifications** Certifications such as: Cisco (CCNP / CCIE) F5 certifications Cloud networking certifications (Azure / GCP) **Exposure To** Network automation tools (Ansible, Terraform, etc.) Container networking and modern application delivery