* Managing & Troubleshooting Azure AD, FS.* Managing Azure RDS server for SAS Programming Infrastructure.* Azure P2S VPN Gateway & Certificate Management.* Managing XCP-NG virtualization environment.* Backup & Restore Server & project data.* Network administration with Mikrotik Router.* OpenVPN server system administration and access management.* Providing IT Support to BD & UK Office.* Access Control server & device access management.* IT Inventory management with the open-source tool.

Duties/Responsibilities: * Microsoft Windows Server 2012 Active directory & file server Install, configure, maintenance & troubleshoot.* Microsoft Exchange Server System administration.* Taking all system backups with Veeam Backup Solution* Call center system maintenance, troubleshooting, monitoring and ensuring reliability. Database backup and restore. * IP-PBX maintenance and troubleshooting.* Video conference maintenance and troubleshooting with Polycom devices.* Zimbra mail server administration, troubleshooting, log monitoring & analysis.* Zimbra mail server backup & restore.* Mail server transaction report generation* Barracuda spam firewall maintenance & monitoring. * Antivirus server maintenance & troubleshoot* CC Camera Maintenance & Troubleshoot* Access control Maintenance, reporting, troubleshooting* Juniper firewall configuration, maintenance, troubleshooting* Network attack detection & prevention*Cisco switch configuration & troubleshooting*Unifi wifi controller, AP installation, configuration, maintenance, troubleshooting & monitoring

Duties/Responsibilities: * VoIP soft-switch configuration, switching, SIP-Trunking, advanced asterisk dial-plan and Billing etc.* Voice media gateway configuration, ss7/PRI/BRI signaling through asterisk, short code routing * Highly customized open source call center installation and configuration like vicidial, Go-Auto-dial, Os-Dial etc. with v-tiger CRM integration, incoming call filtering with based on the caller id and operator prefix priority, multiple campaign, nested IVR etc. script based voice broadcasting, campaign based predictive dialing. * Live Asterisk Call Monitoring system configuration using python which gives monitoring panel of registered extension, web based meet-me conference invitation, DIDs, live calls and channels, active calls in queues, active ss7 peers with showing alarm when ss7 linkset goes down/up etc.* Digium FXS & FXO card installation and configuration with Asterisk based PBX, Digium digital cards (E1) span,dahdi trunk configuration and dial-plan setting for call switching.* Data Center Virtualization using Vmware Esxi, vcenter server and Linux KVM. * Maintaining voice Media Gateway (SS7, SIP, H.323), Voice Soft-Switch Configuration and routing (SIP), Providing Voice Solution (SIP, PRI, SS7, FXO, FXS)* Open source IPPBX and call center backup and restoration.*SIP monitoring system (Monast) installation and configuration*Zabbix, Nagios monitoring tools install,configure & maintenance. Software Expert:Asterisk, vicidial, goatuodial, Free-PBX, Elastix, Asterisk-Now