Designed and implemented LAN/WAN architecture of the company, including network segmentation,VLANs, and routing protocols.Maintained network documentation, including network diagrams, inventory lists and changemanagement processes.Manage network devices (Palo Alto 5220, Cisco ASR 8500, Cisco Switch 9400 and 9300).Maintaining network stability, ensuring network security and reliability of the company.Network monitoring and investigating malicious network activity.Using OSINT tools to identify if the IP is malicious. (virustotal, talosintelligence, whois, abuseipdb,urlfiltering.paloaltonetworks)Blocking Identified malicious IP and malicious Domain

Establishes and maintains network performance.Troubleshoots network problem.Monitor network performance via Network Monitoring (PRTG and MRTG).Establish VLAN, security policy and perform QoS.Configure PBR and static routing on firewall.Report the problem circuits to ISP if there is an offline or intermittent connection.Provide network support.Configure network devices (switch, firewall and access point).Maintain the network infrastructure of the company.

Monitor network infrastructure for performance availability. Support add/moves/change to network infrastructure, including routers, switches, firewall & IPS/IDS Carry out network hardware installation, including routers, switches, and firewall installation. Perform connectivity monitoring to ensure connection to branches is up and running. Report down circuits to respective Telcos if there is an offline or intermittent connectivity of branches. Liaise with carriers and service providers to correct LAN/WAN faults. Perform Sophos Antivirus Enterprise Console Server Monitoring Head. Liaise with vendors for warranty claims, operating system bugs & feature upgrades & roadmap activities. Provide maintenance & support as required. Provide advice & technical support on network methods Performs duties and responsibilities required under the latest manual of operations pertaining to your position; and Performs other tasks as may be assigned from time to time.

Troubleshooting network issue.Configuring SPAN(Switched Port Analyzer) for tracing data.Monitoring firewall Syslog.Back-up all Cisco router, switch and Juniper firewall command.Support field engineer for router issue.