Senior Network Administrator

Liaquat National Hospital · Karachi, Pakistan

FULL TIME

Job Description

Install, configure, upgrade, and monitor enterprise network devices toensure high availability and performance.
Design, implement, and manage Layer-2 and Layer-3 networks, includingVLANs, ACLs, STP/RSTP, QoS, and routing protocols (OSPF, BGP, EIGRP).
Manage traffic flow across access, distribution, and core layers for lowlatency and fault tolerance.
Troubleshoot complex network issues such as routing loops, broadcaststorms, and performance bottlenecks.
Configure and manage firewalls (Cisco ASA, FortiGate, Sophos), NAT,access controls, and security rules for internal, DMZ, andinternet-facing networks.
Design, implement, and maintain DMZ architecture to host securepublic-facing services.
Administer MPLS circuits and support any deployments related to networkservices to optimize performance and redundancy across sites.
Deploy, configure, and manage enterprise wireless solutions (Aruba,Cisco, Cambium, Huawei, etc.) and firmware lifecycle management.
Implement and manage NMS platforms, including SolarWinds and PRTG, tomonitor network health, conduct root cause analysis, and lead incidentresolution
Plan and manage primary and disaster recovery sites, includingbackup/failover strategies and specialized networks (CCTV, criticalinfrastructure).
Manage end-to-end network projects and maintaining accuratedocumentation and network topology diagrams.

Bachelor’s or Master’s degree in Information Technology, ComputerScience, or a related field from a recognized institution.
Minimum 5 years of hands-on experience in enterprise networkadministration, supporting LAN, WAN, MPLS, and internet-facing networksin large-scale or mission-critical environments.
Strong expertise in network performance optimization, routing andswitching, firewall security, and the design of high-availability,resilient network architectures.
Demonstrated experience managing core and distribution layer switches,as well as multi-vendor network environments, including Cisco andHuawei.
Hands-on experience with network monitoring and management tools such asSolarWinds and PRTG for proactive fault detection and performanceanalysis.
Demonstrated skills in incident management, root cause analysis, andemergency response for critical network outages.
CCNA and CCNP certifications required; additional security or wirelesscertifications are a plus.
Excellent verbal and written communication, strong analytical andtroubleshooting skills, and thorough documentation capabilities.

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