Isuru Dahanayake

Experience

• 

  Carlton Sports Network

  Jan 2015 - Dec 2015

  IT Assistant
• 

  Sri Lanka Telecom

  Jan 2016 - Dec 2021

  • Operation and monitor all the network, hardware issues understand and troubleshoot Cisco, Cisco ACI, Firewall, VMware and ARUBA devices etc., Windows, Linux OS related issues and CCTV Systems.• Preparation of IT infrastructure. (Installing hypervisor, Firewall, OS and providing Network reachability).• Server rack arrangement, server installation, configure and Fiber, Copper Structured Cabling installation.• Monitor and Troubleshoot of Electrical and Mechanical Systems of the data center. (Gen sets, Electrical Panels [High Voltage Electricity – Low Voltage Electricity], Ups Systems, Battery Systems, PMM, PDUs, Chillers, Cooling towers, Thermal storage tanks, PAHU units, CAHU units, WTP, RPU units, Fire Detection and Suppression Systems, VESDA, etc.).• Day to day monitor and inspect all the data center facilities and prepare site inspection records. (Electrical and Mechanical Systems).• Operation and maintenance all the data center facilities.• Provide customer support, customer related issues and support data center customer visits.• Monitor Building Management Systems.• Shift duty 24x7x365 Show less • Routers: Installation, configuration and troubleshooting, Cisco Routers (7200, 7600, 12000, 9000) Juniper Routers (M7i, M10i, MX 480, MX 960)• Switches: Installation, configuration and troubleshooting, Cisco Switches (Cisco 2950 ,2960 ,3560 ,4500-E)• Network Monitoring Tools: Installation, configuration and management etc. (Cacti, Zenoss)• Routing Protocols. (BGP, OSPF, EIGRP)• Network Troubleshooting• Operation and monitor all the network, hardware issues.• Preparation of IT infrastructure. (Installing hypervisor, Firewall, OS and providing Network reachability).• Operating Systems: Installation and troubleshooting, Linux: Centos, Ubuntu Windows: Windows Server 2008 - 2012, Windows 7, 8, 10•Hypervisors: Installation, VM creation and troubleshooting, VMware ESXI• Server rack arrangement, server installation, configure and Fiber, Copper Structured Cabling installation.• Monitor and Support Server room facility management. (Electrical and HVAC Systems)• Provide support for third-party vendors, customer related issues and support network operations center.• Asset management, Labeling and manage all server room store. Show less

  • Technical Professional (Data Center)

    Mar 2018 - Dec 2021

  • Technical Professional ( ISP Operations )

    Jan 2016 - Mar 2018
• 

  LB Finance PLC

  Oct 2021 - Jan 2023

  Network Engineer

  • Routing Protocols, Network problem analysis and troubleshooting• Strong Knowledge of switch technology, Wireless, Vlan, VTP, EtherChannel, VRRP, HSRP, STP, VoIP, VPN, IPsec, SSL VPN, IPS/IDS, NAT• Knowledge in Configuration Cisco SD-WAN• Knowledge and Experience in Configuration Cisco Nexus Devices• Fortinet Firewall and FortiAnalyzer Administration and Configuration• Checkpoint Firewall Administration and Configuration• Sophos Firewall Administration and Configuration• WAF Administration and Configuration• Knowledge and Experience in LAN/WAN/DMZ Networks• Cisco Wireless LAN Controller (WLC) Configuration and administration Wireless Access Points• A10 Network Load Balancing Configuration• Itheon WAN Optimizer Configuration (Qos)• Manage Engine Desktop Central Patch Management and Automation• Proxy Server Configuration and Administration (pfSense)• Administration Cisco Webex• Cisco Call Manager Configuration and Administration (CUCM)• Experience in Cisco ISE (Cisco Identity Services Engine)• HP Enclosure Vmware ESXI, VCenter, 3PAR Configuration and Administration• Windows Server, Linux OS, DNS, DHCP, Active Directory• Configuring and Administration Backup servers ( Comm vault , Synology)• Configuration and Administration Kaspersky Endpoint Security Server ( Server, Workstation, Data Encryption and etc.)• Configuration and Administration Network Monitoring Systems ( Cacti, Zabbix, Op-manager, Zenoss, ELK Stack)• Administering enterprise IP networks in mission-critical, 24x7 production environments Show less

• 

  Cube Networks

  Jan 2023 - now

  o Providing network technical support and implementing solutions for enterprise key clients in Australia (Kmart, Target, Officeworks, Repco).o Managing and monitoring all installed network infrastructure within the managed services environment.o Monitoring network engineering performance and ensuring the highest levels of network infrastructure availability.o Troubleshooting and managing firewalls and network services across Fortinet, Cisco, Meraki, Juniper SSR, Riverbed, Palo Alto Panorama, FortiManager, AlgoSec, FortiAnalyzer, and Juniper Mist.o Creating emergency change requests and applying firewall configuration on FortiGate, Cisco, Meraki, and Palo Alto firewalls with post-verification.o Troubleshooting Cisco ACI multi-pod fabric in data center environments.o Supporting LAN, WAN, Wireless, Voice, IDS/IPS, VPN Solutions, Web Application Firewalls, Content Filtering, Cisco ISE, DNS/DHCP Systems.o Strong understanding of network technologies and protocols, including SD-WAN, TCP/IP, BGP, VPN, IPsec, Routing, and Switching.o Working with service vendors on TAC cases (Cisco, Fortinet, Meraki, Juniper, Palo Alto).o Hands-on experience with NGFW Palo Alto Firewall, Fortinet, and Cisco Firepower Threat Defense.o Experience with Cisco Meraki, Cisco Prime, Cisco Identity Services Engine (ISE), and Cisco Unified Communications Manager (Call Manager).o Configuring network devices and services (e.g., routers, switches, firewalls, load balancers, VPN, QoS).o Performing network maintenance and system upgrades, including service packs, patches, hotfixes, and security configurations.o Providing intermediate technical support (level 2/3) for network/security device configuration, troubleshooting, root-cause analysis, vendor management, and escalation.o Adhering to ITILv4 processes and executing incident, problem, change, and service requests efficiently and prioritizing in line with SLAs.o Proactively monitoring and recording alerts generated from ITSM tools. Show less • Providing network technical support and implementing solutions for enterprise key clients in Australia. (Officeworks, Kmart, Target, Repco)• Managing and monitoring all installed network infrastructure within managed services environment.• Monitoring network engineering performance and ensuring the highest levels of network infrastructure availability.• Troubleshooting and managing Fortinet, Cisco, Meraki, Palo Alto, Panorama , Forti Manager, and Forti Analyzer services.• Responsible for creating emergency change requests for FortiGate, Cisco, Meraki, Juniper and Palo Alto firewall changes, applying firewall configuration, and post-verification with customers.• Troubleshooting Cisco APIC multi-pod fabric within the data center environment.• Demonstrated technical expertise in supporting network services that include LAN, WAN, Wireless, Voice, IDS/IPS, VPN Solutions, Web Application Firewalls, Content Filtering, Cisco ISE, DNS/DHCP Systems.• Strong understanding of network technologies, protocols, and industry trends (SD-WAN, TCP/IP, BGP, VPN, IPsec, Routing, Switching, traditional WAN technologies)• Working with service vendors on TAC cases (Cisco / Fortinet / Meraki)• Hands-on experience with NGFW Palo Alto Firewall, Fortinet, and Cisco Firepower Threat Defense.• Hands-on experience with Cisco Meraki, Cisco Prime, Cisco Identity Services Engine (ISE), Cisco Unified Communications Manager (Call Manager), and Juniper Mist.• Configure various network devices and services (e.g., routers, switches, firewalls, load balancers, VPN, QoS)• Perform network maintenance and system upgrades including service packs, patches, hot fixes, and security configurations.• Provide intermediate technical support (level 2/3) related to network/security device configuration and troubleshooting, root-cause analysis, vendor management and escalation.• Adhere to ITILv4 processes, execute on incident, problem, change and service requests in a timely and efficient manner. Show less

  • Network Security Engineer

    Oct 2024 - now

  • Network Operations Center Engineer

    Jan 2023 - Oct 2024