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Senior Network Administrator

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Job Description - Senior Network Administrator

  • Architect, deploy, and maintain enterprise LAN/WAN environments utilizing Fortinet (FortiGate/FortiManager), Cisco Meraki (MX/MS/MR), and Juniper (SRX/EX) platforms

  • Lead network implementations, upgrades, and migrations, ensuring minimal downtime and adherence to change management processes

  • Identify, remediate, and proactively eliminate network problem areas through root cause analysis and performance tuning

  • Design and manage SD-WAN, high-availability (HA) firewall clusters, VLAN segmentation, and secure network zoning

  • Configure and troubleshoot advanced routing protocols including BGP and OSPF

  • Implement and maintain IPSec and SSL VPNs, site-to-site tunnels, and remote access solutions

  • Administer and secure Azure network connectivity, including VPN gateways, virtual networks, and network security groups (NSGs)

  • Develop, audit, and enforce next-generation firewall policies, IDS/IPS, and threat protection controls

  • Monitor and support VoIP systems, including SIP trunks, QoS configuration, and performance metrics (latency, jitter, packet loss, MOS), ensuring high call quality and reliability

  • Perform packet-level analysis and advanced troubleshooting to resolve complex network and voice issues

  • Maintain detailed network documentation, topology diagrams, standard operating procedures, and configuration backups

  • Produce KPI and performance reports covering uptime, security posture, capacity, and voice quality metrics

  • The ideal candidate will demonstrate advanced hands-on expertise, strong documentation discipline, and the ability to lead infrastructure initiatives while maintaining a secure, highly available, and performance-optimized network environment.

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