Walid Mohamed

Experience

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  TEData

  Sept 2013 - Jul 2017

  Service Planing & Design Senior Engineer

   Manage and configure Cisco ASA 5510,5520 and 5550 Manage Juniper SRX, ISG1000 Mange and Configure Dell Sonicwall Manage and Roubleshoot Cisco Intgrated Service Engine ISE for(Raduis and Tacac+, ACS) Configure and Troubleshoot various telephone types ANALOG /DIGITAL and IP. Configure and manage also troubleshoot all Cisco Switches and Routers Troubleshoot Juniper Switches and Routers Liaise with higher level support for incident escalation and resolution.  Activate escalation procedure with vendors when needed.  Perform release management activities. (implement new release and upgrades).  Troubleshooting, Managing Cisco CUCM Preparing technical sheets and Health check for voice system daily or weekly . Manage and plane also Troubleshoot Cisco Video Conference Manage and configure HP, Netgear and other vendors network Device. Installation, operation and maintenance of Cisco Enterprise Voice Gateways. Installation and maintenance of VOIP media servers and media gateways. Installation and maintenance of Juniper SRX and DellSonic Wall firewall. Technical customer support for Cisco and Juniper Security Systems Enterprise products and related software applications. Install and configure Nextone (RSM) VOIP system. Show less

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  Orange Business Services

  Aug 2017 - Mar 2020

  Unified Communication Implementation Expert (VCPT)

  -Technical Duties:•Implementation and testing of Signaling/Trunking Network:oIMS/NGNImolementation, Operation ACME SBC AP4500/AP4600 oSS7/ISUP/SCCPoISDN PRIoSIGTRANoSIPoH.323oMGCPoH.248•Implementation and testing of Services:oCall Center collection, translation and routingoCarrier Selection/Carrier Pre-selectionoPrivate/Public Dial PlansoLeast Cost Routing (National/International)oLawful InterceptionoMalicious Call BlockingoOrigin Based Routing (Zoning)oCarrier Hubbing•Major Projects:oVoice Network Restructuring ProjectReplace legacy Nortel DMS/GSP TDM switches with an Italtel iMSS native NGN/Softwitches.Implementation of 23 pops, devided into 4 softswitches.Building PSTN interconnection for each pop using SS7/ISUP and ISDN PRI trunks.Building back bone interconnection for each pop using SS7/ISUP towards legacy TDM switches, and using iMCP & MGCP towards other pops in the same softswitch.Building inter-softswitch backbone trunks using ISUP-IVS & SIP.Replicate all customer configurations from each legacy TDM switch to the corresponding pop within the softswitch.Migration and testing of each customer from leagcy TDM switches to the corresponding pop within the softswitch.oSIP CL 4 TrunkingBuilding SIP backbone trunks interconnecting 6 softswitchesBuilding SIP trunk for Conference BridgeBuilding SIP trunks for international carriers interconnectionsoSIP CL5Enterprise VPN telephony customers connections using:ACME SBC , Italtel iMSS/VTCH, HP/ATOS SIP ServersoAS/SCPMigration from legacy ATOS SCP to HP/ATOS ASMigration from SS7/SCCP/INAP to SIGTRAN/M3UAIntegrating H.323 GK, SIP Servers, IN SCP into one unified AS platform that can terminate H.323, SIP, SIGTRAN signaling and use a centralized dial plan and service logic.oRMGImplementation of Huawei UMG (Midi/Mini) as a Remote Media Gatway collecting traffic from many countries.Backhauling signaling using SIGTRAN (M3UA,IUA) and H.248 to the nearst NGN pop. Show less

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  NTT Ltd.

  Mar 2020 - Aug 2024

  Operating Cisco CUCM and Voice gateways -Operating and troubleshooting network infrastructure ex cisco routing and switching FortiGate and F5 LTM-operating and troubleshooting cisco WLC , Meraki Aps and switches -Manage and operate cisco Prime infrastructure (CPI)-Performing complex network equipment configuration and installations-Installing/replacing optics or modules in switches as well as making final physical connections for new links between backbone devices or backbone and building devices.- Installation & Configuration of Cisco 2960, 3500, 4500 and 6500 series Catalyst ,N5K,N7k,N9K , Fexs ,ISRs,DNAC,ISE,L2 and L3 Switches.- Troubleshooting, isolating, implementing and recommending corrective action based on network problems impacting larger portions of the University network.-Perform information gathering and discovery/confirmation diagnostics during wide- spread outages.- Handled the tasks of following new developments in security protocols, switching/routing Technologies and network operations.Handled the tasks of providing network and workstation supportQuality assurance of incidents logged (proper incident description, problem incident priority, subject, resolution, etc...) Show less

  • Subject Matter Expert(L3)

    Jun 2023 - Aug 2024

  • Senior Network Integration Engineer

    Mar 2020 - Jun 2023
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  MITEL CZ

  Jun 2021 - Feb 2022

  UC System Design/Architecure

  *Create SIP trunks and VOIP services to integrate with Mitel Platforms.*Support and improve Fraud Detection Services and Methodology .*Contribute improvements to the availability , scalability , latency and efficiency of telecom services .*configure and troubleshoot SBCs and various voice routing platforms .*contribute to our deployment and automation tools to more efficiently detect , address and prevent problems .*debug problems at scale for our mission-crtitical services and help our platform and operations teams to implement lasting fixes.*Platform interoperability testing with VOIP Vendors .*Influence and create new designs , architectures , standards and methods for large-scale distributed systems .*Manage network design for VOIP Traffic with service provider partners.*implement managed VOIP services and networks thought Google Cloud Platforms (GCP). Show less

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  Novartis

  Aug 2024 - now

  Senior Solution Architect DC and WAN services (ACI&SDWAN)

  · Design, Implement and maintain LAN, WAN, Wireless networks and DC services· Provide technical support and troubleshooting for network-related issues when required.· Perform network monitoring and capacity planning to ensure optimal network performance.· Collaborate with other IT teams to ensure seamless integration of network infrastructure.· Develop and maintain documentation (HLD/LLD etc.) related to network infrastructure and operations.· Participate in network security initiatives and ensure compliance with security policies.· Keep up to date with industry developments and best practices related to networking.- Automate network infrastructure devices and DC LAN devices (Pyhton/Ansible) Show less