Senior Network Operations Engineer

Role Overview

We are looking for an experienced Senior Network Operations Engineer for our client, one of the world's top 5 largest banks. The role requires strong hands-on expertise in supporting and troubleshooting Enterprise LAN and Wi-Fi environments.

The candidate will be responsible for L2/L3 operational support, complex incident troubleshooting, approved network changes, Root Cause Analysis (RCA), and maintaining high availability and performance of the enterprise network.

Strong hands-on experience with Cisco Wireless or Juniper Mist Wi-Fi is highly preferred.

Primary Skills

• Enterprise LAN
• Wi-Fi / Wireless Networking
• Network Operations & Troubleshooting
• L2/L3 Network Support
• Incident, Problem & Change Management

Preferred Technologies

• Cisco Catalyst
• Cisco Wireless
• Meraki
• Juniper Mist
• Juniper EX Switching
• Aruba
• Ruckus
• Extreme Networks

Key Responsibilities -

Enterprise LAN & Wi-Fi Operations

• Provide L2/L3 operational support for enterprise LAN and Wi-Fi environments.
• Troubleshoot VLANs, trunking, STP/RSTP/MSTP, LACP, LLDP, DHCP, DNS, ARP/MAC issues, ACLs and QoS.
• Troubleshoot switches, interfaces, uplinks, routing and end-to-end connectivity issues.
• Investigate packet loss, interface errors, network loops, broadcast storms and network performance issues.
• Troubleshoot enterprise Wi-Fi client connectivity, authentication, DHCP, DNS, roaming, throughput, latency and intermittent connectivity.
• Analyze RSSI, SNR, noise, channel utilization, retries and AP/client capacity.
• Troubleshoot 2.4 GHz, 5 GHz and 6 GHz wireless environments.
• Troubleshoot WPA2/WPA3, 802.1X, RADIUS and EAP authentication.
• Troubleshoot roaming and client mobility, including 802.11k/r/v.
• Perform packet captures and traffic analysis when required.
• Integrate network devices with monitoring tools and ensure required KPIs are configured.

Juniper Mist Operations

• Onboard and provision Juniper Mist Access Points (APs).
• Configure WLANs/SSIDs, VLAN mapping and RF profiles.
• Troubleshoot AP and client connectivity issues.
• Troubleshoot DHCP, DNS and RADIUS issues using Juniper Mist.
• Use Marvis and Mist client timelines/events for troubleshooting and Root Cause Analysis.
• Monitor and interpret Mist Service Level Expectations (SLEs).
• Manage configuration templates and multi-site environments.
• Perform AP firmware upgrades, replacements and RMA activities.
• Support integration of Mist APs with LAN switching infrastructure.
• Experience with Juniper EX, Mist Wired Assurance and Access Assurance will be an added advantage.

Incident, Problem & Change Management

• Own and troubleshoot P1/P2/P3 incidents within defined SLAs.
• Lead or participate in technical troubleshooting calls and major incident bridges.
• Coordinate with clients, NOC, Service Desk, OEM TAC, ISPs and field engineers.
• Provide clear technical updates and drive incidents through to resolution.
• Perform detailed RCA for major and recurring incidents.
• Identify trends and recommend corrective and preventive actions.
• Review HLD/LLD documents and identify implementation dependencies and risks.
• Prepare and execute MOPs, implementation plans and rollback procedures.
• Implement approved production network changes and perform pre- and post-change validation.
• Support network migrations, AP/switch replacements, firmware upgrades and configuration changes.
• Maintain operational documentation, network diagrams, troubleshooting guides and knowledge articles.

Required Experience & Skills

• 8-10+ years of experience in Enterprise Network Operations and Infrastructure.
• Strong hands-on experience in Enterprise LAN and Wi-Fi operations.
• Strong troubleshooting knowledge across L2/L3 networking.
• Hands-on experience with enterprise switching and wireless technologies.
• Strong understanding of VLANs, STP, LACP, DHCP, DNS, ARP, MAC, ACLs and QoS.
• Hands-on Wi-Fi troubleshooting experience covering authentication, roaming, RF and client connectivity.
• Strong experience with Cisco Wireless or Juniper Mist Wi-Fi is highly preferred.
• Ability to independently own incidents from identification through troubleshooting, resolution, validation, RCA and preventive action.
• Strong communication and incident management skills.
• Banking/financial services experience will be preferred.

Preferred Certifications

• CCNP Enterprise
• JNCIA / JNCIP
• CWNA / CWNP
• Aruba Certifications
• Ekahau ECSE
• ITIL Foundation

Preferred Candidate Profile

Immediate Joiners preferred.

Candidates with experience supporting large enterprise or banking environments, along with strong hands-on LAN, Wi-Fi and Juniper Mist/Cisco Wireless troubleshooting experience, will be preferred.