Abhishek Thomas

Experience

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  Ericsson

  Apr 2011 - Jul 2014

  Engineer - Network Eng

  Client: Sprint Nextel Corporation (Sprint Communications USA)Mapping client’s requirements & architecting customized solutions to suit their requirementsConfiguring Cisco Router Connectivity and SwitchesManaging the installation and configuration of systemsMonitoring performance reports as a measure of preventive maintenanceSuggesting improvements in the operations and processes to make the system full proofTroubleshooting & repairing work of different types of networks.Resolving technical issuesIdentifying performances bottlenecks and taking adequate measures to rectify faultsConfiguring and troubleshooting of VLANs, VTP and Inter-VLAN Routing.Configuration of HSRP, VRRPKey customer interface providing implementation support and communication.Overall owner of end to end project implementationRequisition, Provisioning & testing of DS3s & OCNs); managing to strict deadlines.Implementation of various access strategy plans and concepts.Maintaining appropriate network capacity. Show less

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  BT Group

  Jul 2014 - Jul 2015

  AEI - Customer Implementation Engineer

  Client: Lloyds Banking Group, Pepsico, Vocalink, AvayaKey Result Areas:Configured BGP to provide the connectivity for the customers and routers for various customers of BT present in UK and Asia PacificTroubleshoot Cisco RoutersLiaised with Field Engineer to take the console of the newly mounted devices and coordinated with customer to handover the finally commissioned devicePerformed weekly configuration backups of the devicesAdministered database for all the devices using diplomat and NMS loader toolsConfigured SNMP, AAA, NTP, Logging, Access List on Wireless Controllers (WLCs), APs (Light Weight and Standalone) - PepsiCo Global ProjectSuccessfully managed configuration of AAA, Radius configuration in the routers, WLCs and Standalone APsManaged renewal of root certificates in the routers - Vocalink, UK and upgraded the IOS in the routersSupervised the configuration of HSRP, VRRP and prefix-list and route mapsHighlights:Configured FEX, vPC, Port-channels, OTV, VLANS on Nexus Devices - Lloyds Banking Group, UKInstalled license (as requested by the customer) on Nexus core devicesInstalled new routers and liaised with Field Engineer and provided internet connectivity to customers if troubleshooting required - PepsiCo India Project Show less

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  HCLTech

  Jul 2015 - Aug 2019

  Client : CiscoKey Result Areas:Worked on the tickets and notified team members to follow the process/ technicalManaged faults and escalation (identified and responded to faults on systems and networks)Performed basic troubleshooting for Cisco WLCsOperated on ticketing tools such as ServiceNow, BMC Remedy, Cisco MAP and QuicksilverDirected team members and enhanced their skills in technical as well as processHighlights:Worked in NOC Operations (Monitoring, Troubleshooting and Configuration)Delivered onsite engineering support, supervised installations and ensured high degree of commitment for successful outcomeSuccessfully troubleshot WAAS and ACNS devices and the disks Show less

  • Associate Consultant

    Jul 2018 - Aug 2019

  • Technical Specialist

    Jul 2017 - Jul 2018

  • Senior Specialist

    Jul 2015 - Jul 2017
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  Adobe

  Aug 2019 - Nov 2020

  Senior Network Engineer

  Key Result Areas:Working as Senior Network Engineer in Global Operations Center and managing operations on LAN/WAN, Cisco Wireless and Layer 3 Routing on Firewall, ACS, ISE & VPNDeveloping policies on Versa Director which manages the Versa Box at each site and push configurationChecking policies deny/accept for the users in Palo Alto and configuring policies for the URLsCreating URL filtering in Palo Alto; working on DNS requests such as adding CNAME, Mapping Hostname to an IP AddressManaging day-to-day operations like LAN port not working, slow speed on WIFI connection, port configuration for new IP camera installation, voice & data vlanWorking in maintenance windows with onshore support to work on schedule changes for replacement of faulty modulesExecuting Installation of new Access Switches and IOS UpgradationHighlights:Deployed 2 Versa Box at each site with INET Transport to have the Internet Links on it; for High Availability Versa Boxes are running VRRP wherein one is Active and other one on StandbyWorked on SD-WAN architecture (versa) and troubleshot accordingly if any BGP neighbour flaps with ISP or Controller and open ticket for an RFO with ISPDeveloped A records in DNS; added IP subnets under IPAM for future use which are worked on tool InfobloxFunctioned on Cisco ISE version 2.2.0 to verify authentication logs and troubleshot accordingly if any user AUTH failsOperated on Cisco Secure ACS for Vendor Contractors of Adobe and created ACL under different VPN vendor group to access the applications at the client side Show less

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  DXC Technology

  Dec 2020 - now

  Associate Manager - Networks

  Working as Network Architect/Manager to handle escalated/critical issues and provide network solutionResponsible to prepare various reports internally and Client-basedResponsible for network improvisation and manage Azure networking, end-to-end routing, ACI, firewall, wireless, Riverbed and F5Re-designed Data Center for resiliency and high bandwidth throughput as needed to avoid any bottleneckDesigned and implemented the Disaster Recovery (DR) solution for the CustomerRe-designed the Headquarter (HQ) and remote sites to decommission expensive SONET and 2 MPLS links with cost-effective Metro Ethernet linksResponsible for managing Cisco ACI environment and configure/troubleshoot whenever there is new device deploymentConfigured NPS (Network Policy Server) for the dual authentication (MFA)Implemented Aruba 6800 switches as VSF from the scratchResponsible to configure and manage SolarWinds end-to-end and integrated ServiceNow with SolarWinds which increased the productivity by 20%Recommended to replace EOS/EOL switches to the new Cisco Catalyst switches 9200, 9300, 9400 and 9500 seriesMigrated SAP traffic from on-prem to Azure Express RouteWorked with different vendors to provide solution as POC/POV - Colortokens for microsegmentation, Extrahop for SOC, Zscaler for local internet breakoutConfigure, troubleshoot and manage CheckPoint Firewall end-to-end, remediated the Firewalls and tightened the network securityRecommended new Cisco WLCs 9800 and migrated from legacy to 9800 which improved wireless performance by 40%Deployed, Upgraded, Troubleshoot Meru Fortinet Wireless Controllers (WLC) and migrated to Cisco 9800 WLC as per the requirementConfigure and Troubleshoot issues on F5-LTM (Both Intranet and Internet) and run packet captures for deeper investigationDeployed, upgraded and troubleshoot Riverbed WAN optimizer across all the locationsIntroduced automation for daily tasks and proposed SD-WAN solutions (Cisco & Aruba) for better user experience Show less