· CISCO Call Manager - CUCM, UCCX Systems or Microsoft Skype for Business Users / Room System (SRS) Deployment / Testing / troubleshooting Skype for Business On-Premise and O365 Online Hybrid Environment.

· Polycom Endpoint Alert Monitor System Set up using RealPresence Resource Management System (RPRM) for VVX IP Phones and RealPresence Conference Phones on Microsoft Unified Communication (UC) Systems - Skype for Business On-Premise and O365 Skype for Business / Team Online Hybrid Environment for team members.

· Worked with Customers to migrate their users to Microsoft Office 365 (O365) Skype for Business / Exchange Online service faster as customers wanted by providing scripts and helping Customer on resolving on-premise infrastructure issues

· Worked with designated Customers to preform proactive / preventive works as best practice analysis, infrastructure assessment (Architecture & Deployment) and network assessment, … Also, to perform reactive works as service breakage troubleshooting, and outage resolution on Microsoft Team Migration, Microsoft Skype for Business 2015 (On-Premise & O365), Lync 2013 (On-Premise & O365),, Lync 2010 Infrastructures and Skype for Business Online along with associated Topology / Configuration - Windows Server, Active Directory, ADFS, Firewall, DNSs, Certificates Gateways and Load Balancers, Lync Day to day Level 1 to Level 3 Lync / Skype for Business Room or Third-Party Conference Room (e.g., Zoom, Polycom Room…) maintenance and troubleshooting room or Third-Party Conference Room (e.g., Zoom, Polycom Room…) - Conference Room Audio Visual Technologies and Session Initiation Protocol (SIP) Trunks integration

· Microsoft Lync 2013 On-Premise Configurations (Microsoft Server 2012 Server, Firewall, DNS and Load Balancer) fine-tuning based on Lync KHI (Key Health Indicators) and Microsoft RAP (Risk Access Program) analyzing. SIP trunk One Way Audio / Dropped Calls / Call Quality troubleshooting, QoS configuration and troubleshooting.

· Lync User and Microsoft Lync 2013 On-Premise UC platform supports, maintenance and troubleshooting - Lync 2013 Servers, UM Exchange, and AudioCodes EMS / SEM System for AudioCodes M1K/MP1XX Gateways (ISDN PRI and PSTN FXO) and AudioCodes M4K SBC provisioning, deployment maintenance and troubleshooting (User, Voice Route, Voice Policy, Response Group, Gateway). Aroura Wi-Fi SDN QoS provisioning / maintenance. Use Monitoring tools to proactively identify issues.

· Lync Room or Third-Party Conference Room (e.g., Zoom, Polycom Room…) maintenance and troubleshooting.

· Migrated 7,000 users from Microsoft Office Communications Server 2007 OCS R2, Lync 2010 and Lync Online (O365)to Microsoft Lync 2013 On-premise Enterprise Server Pools (Edge, Core (Front End and Backend SQL), Office Web Application and Persistent Chat) that were designed and deployed for client with new Topology / Configurations (Windows Server 2012 Server, Firewall, DNSs, Certificates and Load Balancers). Using PowerShell scripts for Lync Users migrations.

· Re-Architected three Microsoft Lync 2013 UC On-Premise Central Sites within client’s MPLS networks - Hybrid with Office 365 (O365). Besides Lync 2013 Core and Office Web Application Pools, each site has one Large Conferencing pool. With the introduction of AudioCodes M4K SBCs (Adding new realms, local policy and LRT) for SIP trunks connectivity, it saved lots of PSTN cost for Client. It also provides the platform for future FAX Services integration. And set up Firewall, DNS, ADFS / AAD and Load Balancer, Microsoft Server 2012. Configuration

· Deployed 40+ Lync 2013 Enterprise Voice branch sites globally with 40,000 users - Hybrid with Office 365 to replace existing Cisco Call Manager Voice Networks using AudioCodes SBC and Gateway / SBA (M1K/MP1XX) for PSTN connectivity (ISDN PRI, PSTN FXO), Paging System and CP-911 migration. Integrating / Migrating Voice Mail to Office 365 UM Exchange. Defining provisioning rules and policies for Lync 2013 Enterprise Voice, Office 365 UM Exchange and Gateway / SBC / SBA during 40+ sites Lync 2013 Enterprise Voice Migration / deployment.