Leading / Senior Network Administrator

01-09-2025

163

Design, implement, and maintain enterprise network infrastructure (LAN/WAN/VXLAN/DMVPN).
Configure and manage Cisco routers and switches, ensuring high availability, redundancy, and scalability.
Administer Palo Alto firewalls including security policy management, NAT rules, VPN.
Manage and optimize 3CX-based IP telephony systems and SIP trunk integrations.
Ensure secure and stable communication between production and disaster recovery sites.
Monitor network performance, proactive troubleshooting, and resolve complex incidents.(PRTG,Zabbix, Graylog).
Apply best practices in network security, segmentation, access control, and VPN configuration.
Maintain up-to-date network documentation including diagrams, configurations, and change logs.
Collaborate with DevOps, System Administrators, and other IT teams on cross-functional projects.

Experience (3+ years) as a network administrator in an enterprise environment.
Working knowledge of Cisco technologies including IOS, OSPF, BGP, EIGRP, VLAN/VXLAN, and DMVPN.
Solid understanding of firewall administration, preferably with Palo Alto (PanOS).
Work experience with IP telephony systems, especially 3CX or similar platforms.
Good understanding of disaster recovery networking and dual-site infrastructure setups.
Proficiency with network monitoring and troubleshooting tools (e.g., Wireshark, SNMP, Syslog, NetFlow).
Certifications such as CCNP, PCNSE, or equivalent (Preferred but not mandatory).
Familiarity with SD-WAN, Zero Trust Network Architecture, or NAC systems.
Scripting knowledge (Python, PowerShell) for automation of network tasks.