Umair Khan, System Administrator

Umair Khan

System Administrator

Arpatech

Location
Pakistan - Karachi
Education
Diploma, Cisco Express Foundation for Field Engineers, CXFF (Certified)
Experience
16 years, 8 Months

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Work Experience

Total years of experience :16 years, 8 Months

System Administrator at Arpatech
  • Pakistan - Karachi
  • My current job since October 2011

• Install and Maintain VMWare ESX environments on Local/Remote DataCenters.
• ESX /VMServer Virtual Machines Backup, Maintenance using GhetoVCB.
• Installed Nagios to monitor diffrent services like java server, mysql health, vmware backup, iis service, apache server etc
• Write Custome Nagios script to monitor server errors, vmware backup status.
• Configured Mikrotik router port forwarding to local lan servers
• Write Mikrotik script to enable, disable rules and backup the configuration.
• Setup SugarCRM, JBoss, Tomcat, Joomla, PHP, Apache and MySQL bases servers.
• Responsible for deployment of new application release and patches related to application bug fixes.
• Configured Asterisk PBX with custom dial-plan and phpagi for call recording, daily call quota, custome cdr in mysql and Call Queue.
• Write OpenVPN script to create server configuration, iptables rules and client configuration.
• Setup ESVA Email Scanning Virtual Appliance.
• NFS Server and Rsync Setup for remote backups on multiple locations.
• VPN Server with LDAP and PAM auth.
• MySQL Master/Slave with SSL integration, MySQL Multi Mater Setup.
• Apache and MySQL Load Balancing through HA + Apache (through different mods) and MySQL tunings.
• Write Iptables rules to secure server for icmp flooding, port scanning, syn attacks.
• IRed Mail Mail Server Setup for multiple domains.
• Squid Proxy as Reverse Proxy for multi-domain management single SSL certificate.
• LDAP on SSL to communicate with different DMZs.
• Centralized LDAP Access policy implementation.
• Disaster Recovery and Backup policy implementation.
• Write Vmware PowerCli script for VM reporting and management.
• Setup Varnish with Nginx for Web Site load balancing and auto fail over.

Senior Network Engineer at Seven IT
  • Pakistan - Karachi
  • September 2007 to October 2011

• Deployed and administrating Asterisk VoIP server.
• Installation and configuration squid transparent proxy, active directory, samba server, internal Mail server, shorewall, nagios. Apache, Mysql server.
• Write script for daily local and production backup.
• Connect office PBX to Sydney office PBX via Quintum Gateway.
• Configure Asterisk Call recording, conferencing and Voicemail service.
• Configure Asterisk with quantum PSTN gateway.
• MySql setup, MySql Cluster and Replication Master to Master Slave for CRM databases.
• Install Active Directory for Authentication and backup’s critical date to remote drives via batch script.
• Configured Pfsence firewall for WAN load balancing.

Network Engineer at pixsense
  • Pakistan - Karachi
  • September 2007 to February 2010

• Manage and maintain a Microsoft Windows Server 2003 environment
• Implement wireless network for office laptops
• Install, configure, and administrate Microsoft Windows XP workstations
• Configure network IP addresses, proxies, and gateways
• Install Microsoft update server to update latest Microsoft product
• Monitor local backups troubleshoot problems associated with those events
• Install, configure and maintain antivirus solutions
• Design & implement VPN to connect different remote location
• Documentation of Infrastructure, Issues, Incidents and Solutions
• Install mysql with master & slave replication
• Install apache server with load balancing by using round robin technique
• Network cabling preparation and installation
• Complete Purchasing for office use & department
• Store & stock maintenance of IT Devices and accessories
• Troubleshoot and maintain computers and printers

Education

Diploma, Cisco Express Foundation for Field Engineers, CXFF (Certified)
  • at Cisco
  • November 2010

Cisco ID CSCO11234540

Diploma, Cisco Certified Network Associate, CCNA (Certified)
  • at Cisco
  • August 2010

Cisco ID CSCO11234540

Diploma, Red Hat Certified Engineer, RHCE (Training)
  • at On wire Education
  • June 2005
Diploma, Microsoft Certificate (MCSE)
  • at Computer Training & Testing Centre (CTTC):
  • February 2005
Bachelor's degree, B.S.C
  • at Ship-owner Govt. College Karachi
  • May 2004

Specialties & Skills

Linux Database
Linux Server
VMware ESX
Red Hat Linux
VMware Infrastructure
Windows server, active Windows server, Linux server, Cisco router and switches.
Apache, Mysql, Postfix, Sendmail, Bind, Squid, Dhcpd, Iptables, Shorewall, Mikrotik, VMWare ESX
Asterisk, Asterisk phpagi scripting and diaplan programing, FreeSwitch, Vicidial
Haproxy, Varnish,Nginx,Mysql Master-Slave, Openfiler , Bash Scripting,
Cisco Router, Cisco Call Manger, Cisco Switch

Languages

Urdu
Beginner
English
Intermediate

Training and Certifications

Red Hat Certified Engineer (Certificate)
Date Attended:
January 2005
Valid Until:
February 2005
Cisco Certified Network Associate (Certificate)
Date Attended:
January 2005
Valid Until:
February 2005
Cisco Express Foundation Field Engineer (Certificate)
Date Attended:
January 2005
Valid Until:
February 2005