System Administrator
osn
Total years of experience :15 years, 9 Months
Responsibilities and Projects Done:
• Installation, Configuration and trouble shooting of Linux Based Servers, RHEL, Centos, Ubuntu Servers, FreeBSD.
• Configuration & Troubleshooting of Domain Controller and Additional domain controllers
• Migration of Active Directory from Windows 2003 to 2008
• Migration and troubleshooting Exchange 2007/2013 servers
• Implementation and configuration of Citrix Xen Virtualization.
• Implementation and configuration of GFI fax maker for Exchange Server 2003 and Exchange Server 2007.
• Configuring and Managing of IBM Blade Center and SAN, Hardware RAID, NAS Storage
• Installation and configuration of Internet Leased line Cisco routers and ASA firewall.
• Administration of ADSL routers, wireless routers and wireless access points
• Implementation of Network Printers, Scanners and local printers
• Backup and Recovery of Cisco routers, firewalls and switches
• Implementation of Internet and point-to-point Leased lines from Dubai to other regional offices
• Creation and Management of VLANs, STP.
• Performed the Mailbox recovery using Recovery Storage Group.
• Administration of ESET Antivirus and Deploying the Client and Server Machines
• Implemented backup and restore strategy using External Magnetic Storage Media.
• Implemented Nagios Services to monitor the status of the Windows and Linux servers
• Setting up and configuring Linux servers for large oracle databases.
• Implementation of Linux NTP servers and monitoring traffic using mysar software
• Configuration and Maintaining of Call Center Applications
• Making policies and procedures for Information Technology
• Implemented Squid proxy firewall (Linux) to control user activities.
• Implemented DHCP server to provide IP address to telephones and client PC's
• Planning and setup the datacenter operations.
• Installing and configuring high end Redhat servers (RHEL) for oracle platforms.
• Installing & configuring VMware vSphere ESXi.
• Implemented Cloud systems using Cloud stack and FreeNas.
• OpenVPN (Linux) implemented for the IT department to operate the servers from home.
• Information technology Security auditing.
• Email Encryption using PGP
Responsibilities: 1. Server setup, maintenance and management over ssh and KVM.
2. Managing 300+ servers at a time alone.
3. Server migration between servers via internal & external networks.
4. Installing 3 party s/w, System s/w and video support platform.rd
5. Schedule backup generation, restore and disaster recovery.
6. Implementation of LAMP environment in various ways.
7. Implemented Internal Chat server using OpenFire
8. Monitoring and fine tuning mysql, php, apache and mail for better performance
9. Securing systems using firewalls, log tracking, intruder checkers and antivirus to prevent DDOS, spamming and exploits.
10. Implementation of Nagios, Cacti, rrdtool to monitor server stress, network and bandwidth monitoring.
11. Developing bash script for the automation of server tasks.
12. Disk management (RAID, LVM, Disk quota)
13. Kernel compilation and fine tuning.
14. Hardware virtualization with Xen, OpenVZ.
15. Software virtualization with VMware workstation and Oracle virtual box.
16. Coordinate with Datacenters to troubleshoot network, server hardware problems.
17. Installing and maintaining machines in LAN for development department.
18. Experienced in communicating clients over chat & Email.
19. Advanced Administration for webhosting accounts through control panels like cPanel, Plesk, Ehcp.
20. Fulfil all the needs of developers like software upgrade and fine tuning etc.
21. Installing and configuring workstations for IP based LAN
22. Configure and manage VLANs and VLAN Trunks
23. Cisco routers 17XX, 25XX, 26XX, 35XX and Cisco catalyst switches 19XX, 2950
24. Implementation of networks containing multiple OS like windows and Linux.
25. Managing traffic with the help of Access control list.
26. Planned, Installed, configured and Administration of Exchange 2003 server
27. Performed Disaster Recovery of Windows 2003 domain controller and Exchange Server 2003
28. Implement backup and restore strategy.
29. Maintaining DNS, DHCP
Bachelor degree in Computer Science and Engineering: Gov. Engineering College, Palakkad - Calicut University '2007, Kerala - India