SUMMARY:

• 6+ years of experience in Linux/Solaris/Unix System Administration, Server Builds and Production support of Red Hat Linux, Oracle Linux, Fedora, CentOS, Ubuntu, Sun Solaris, AIX and Windows.
• Experienced in Installation, Administration and Upgradation of Solaris 9/10/11, RHEL 4.x/5.x/6.x/7, using Jumpstart, Kickstart. Working knowledge of AIX installation via NIM.
• Used Satellite server & vCenter Protect for Linux patching and upgrades
• Migration, Patching, kernel tuning and Capacity Planning of Unix infrastructure for mid to large data centers.
• Monitoring and administering of Red Hat Linux on Enterprise class HP Blade servers and Sun Solaris Servers for operating systems, patches, packages, hardware, firmware drivers etc.
• Experience with Virtualization platform (VMWare, Xen, KVM)
• Experience with common protocols and associated services (e.g. DNS, DHCP, HTTP, LDAP, TLS)
• Expertise in performing Disaster Recovery Tests.
• Monitoring and Maintenance on daily basis, administration of servers.
• Worked on security remediation, server hardening, and PCI, SAS70 audits
• Installation, configuration of volume management using VERITAS Volume Manager, Logical Volume Manager, Solaris Volume Manager, ZFS for file system management, mirroring
• Experienced in Data Center Migration activities
• Experience in planning, documenting and supporting high availability, data replication, business persistence, failover and failback processes.
• Scripting in bash, ksh shell. Perl, python and java scripting literate.
• Experience in using BladeLogic, SiteMinder, Gomez, Event coordinator, Control - M GUI.
• Installed various softwares like BMC, Veritas products while building up new servers.
• Expertise in systems performance monitoring & tuning: CPU, Disk, Memory, Network Utilization.
• ITIL / Change compliance awareness and team representation in Change Control Board meetings.
• Experience in setting up environment using NFS, NIS, DNS and DHCP.
• Proficient in Backup utilities, restoring using VERITAS NetBackup.
• Diagnosis of tcpdump, snoop packet captures via Wireshark for troubleshooting
• Proficient in design, implementation and testing of LDAP directory infrastructures.
• Experience with Super PuTTY, Putty and WinSCP.
• Experience with application automation tools like Puppet, Chef, Ansible, Jenkins, and GitHub.
• Solid experience of using LDAP, PAM, Kerberos, SSSD and openssl protocols.
• Good experience in Shell, Python, and Perl scripting. Awk and Sed literate.
• Experience with Linux container clustering technologies like Docker and Kubernetes.
• Knowledgeable of security access and monitoring through Nagios and ArcSight.
• Provided on call support for mission critical servers through 24/7 weekly rotation.

TECHNICAL SKILLS:

Operating Systems: RedHat LINUX Release 3.x - 7.x, Oracle Linux 7.x, Fedora, CentOS Solaris 8-11, UBUNTU, AIX 5.0/5.x/6.1, Windows ‘98- ‘10

Cluster: Red hat Clustering and VERITAS Clustering.

Hardware Sun Fire v440, v880, 4800, 15k, T-series, M-series, Dell PowerEdge servers X86, HP ProLiant BL680c G5 server, HP 9000 servers and F5 Switches:

Virtualization: VMware ESX4 server, VMware Workstation, OVM, KVM and Xen.

Database Servers: Oracle 8/9i/10, 11G, DB2 and MySQL, Content Switching (Load Balancing)

Software and App servers VERITAS Volume Manager, VERITAS Net backup, TSM, Tivoli, Samba, DHCP, NFS, NIS, DNS, DHCP, Send mail, Apache Web Server, Web sphere:

Scripting languages: Perl, bash, python.

PROFESSIONAL EXPERIENCE:

Confidential, San Jose, CA

Systems Admin

Responsibilities:

• Understand Confidential environment and think critically to handle migration and decommission processes in a fast-paced server environment, contribute constructive solutions problems.
• Built RHEL 5, 6, 7 servers as well as Fedora 20-25, CentOS 7.x and Windows ’97- ‘2K servers on ESX 5.x VMware platform
• Update and administer Linux, Fedora, CentOS, Ubuntu and Solaris 11 as well as Windows servers.
• Production support to over 5000+ mission critical servers running multi-terabyte DBs such as Oracle, RAC, Sybase and many more applications such as WebLogic, apache, etc.
• Configuring, monitoring, tuning, troubleshooting and perform system administration activities Linux / Solaris/OVM/Windows servers.
• Performance fine tuning by configuring RAID, kernel parameters, network stack on RHEL and Solaris platforms
• Scripting in korn and bash for job automation
• User management and server security hardening and monitoring with Centrify and Nagios.
• Handle local account issues, Active Directory accounts, Single Identity Middleware (Centrify), for Access Control
• Enable user authentication through AD by configuring SSSD and LDAP with PAM.
• Active Directory and Exchange 2010 Administration which included user account creation and terminations.
• Liaise closely with Change management team for the improvement of the procedures followed by internal customers.
• Configure SAN storage using LVM, Veritas Volume Manager, ZFS
• VMWare ESX(i) 5.0 and above (vSphere, vCenter) and KVM installation, configuration, administration and troubleshooting.
• Support and manage Citrix and F5 load balancers, which help keep site availability up.
• Configure end-to-end LTM and GTM VIPs and the related DNS configurations.
• In depth understanding of Confidential home grown tools like CMS, Montage, Reparo etc.
• Real time Interface with internal services using existing tools/scripts to provision physical, virtual and cloud server and configure compute for production traffic.
• Assist customers by guiding and troubleshooting through PET & server issues and getting their instances up and running.
• Extend application services to Confidential standard data center policy to improve redundancy.
• Utilize Trace & Jira for change control
• Responsible for helping consolidate and close out several data center locations without any impact to customer site.
• Part of a 24x7 on-call rotation, which supported the thousands of servers and hundreds of functions for the customer facing Confidential site.
• Follow established SOPs (Standard Operating Procedures) for various tasks.

Confidential, Chicago, IL

UNIX/Linux Administrator

Responsibilities:

• Provided support to mission critical applications spread over 8000 servers.
• Filesystem resizing, data center migration, and user-administration activities via scripting on RHEL, Solaris and AIX platforms
• Installed, configured, tuned and provided production support for RHEL 4-6, used kickstart, yum repositories for patching, satellite server on VMWare ESXi and standalone servers, and Solaris 8-10 servers, and AIX 6.1
• Worked on building RHEL on VMWare ESX environments, supporting web, app and multi-node DB RAC servers.
• Installed and configured Solaris 8, 9, 10. Configured Zones and LDOMs and containers for Solaris 10.
• Installed, configured and supported load balancing technologies and concepts for data networking.
• Configured FTP, Telnet, FTP, SSH, iptables and SUDO for the servers.
• Designed, implemented & maintained multi node HA environment consisting of Sun and Veritas Cluster
• Prepared server availability report for the management.
• Create and modify Unix Shell scripts with sed and awk to update database, create file reports and monitor system performance.
• Configuring virtual network using bonding and bridging in Oracle VM as well as manage the OVM repositories.
• Assist internal teams such as Oracle DBAs, Network Administrators, Programmers, etc. to install, configure, monitor and tune their software running on the UNIX, LINUX, and OVM servers.
• Used satellite servers for patching, yum package installation, kernel upgrades.
• Implemented Root Mirroring for systems using VxVm (Veritas Volume Manager), OVM, LVM, SVM, ZFS on SAN EMC storage
• Upgraded Veritas Volume Manager from 3.x to 5.x
• Also managed FTP servers, AD/DNS, wireless access points and load balancers.
• Supported databases like Oracle & Web servers like Apache, Tomcat & other proprietary applications.
• Installed Configured and Managed NIS, NFS, DNS and Send Mail. Configured DHCP Red Hat Linux server.
• Performance troubleshooting on day to day basis
• Implementation of PCI security standards for SAS70 and internal IT audits across UNIX shop compromising of AIX (5.3, 6.1), Solaris (8, 9, and 10) and RHEL (4, 5).
• Created and updated Python scripts to update databases.
• Automation of jobs using Perl, Python and Shell scripting.
• Used BMC Remedy for change control
• Built an Oracle Linux server on x86 machines using VMware.
• Built Fedora 22-23 servers on x86 machines using VMware.
• Documentation on team wiki for any technical and non-technical processes

Confidential

UNIX Administrator

Responsibilities:

• Installed and configured RHEL 4,5 (HP blade servers), Solaris 8, 9, 10. and AIX 6.1 in an environment of over 7k servers.
• Used network installation methods - jumpstart, kickstart, NIM
• Configured Zones and LDOMs and containers for Solaris 10, T-series and M-series hardware
• Designed, implemented & maintained multi node Veritas Cluster.
• Prepared server availability report for the management, including capacity management via HBA, Memory and NIC inventory management via Shell Scripting across 7k servers
• Planned & Implemented Patch and Packages installations, quarterly patching of servers with different patching tools like Shavlik and vCenter Protect.
• Upgraded Solaris OS (Live upgrade from Solaris 8, 9 to Solaris 10).
• Upgraded firmware, drivers for server stability e.g lpfs, qualcom, etc for HBAs, T-series firmware for ILO, HP console modules
• Used FTP for file transfers and configuration.
• Supported databases like Oracle & Web servers like Apache, Tomcat & other proprietary applications.
• Shell scripting for job automation in korn (ksh) and bash
• Server security and hardening on Solaris and Linux platforms

Confidential

Associate System Administrator

Responsibilities:

• Administered and maintained Red Hat Linux/Solaris and Windows servers.
• Maintained system/application packages on server.
• User management through NIS, scripting, sudo access
• Migration of servers to new hardware (HP Blade Center) and new OS version, responsible for all UNIX related issues including OS, device drivers, OS tuning, environment setup for applications and updates
• Compiled kernel, Device drivers, performance tuning for OS and application, customization as per requirements, security patching
• Utilized Vmware 5.5 to build virtual Windows 2012 Servers and Windows 7 Desktops in a 100+ server environment.
• Configured different hardware and software components as per requirement to support UNIX initiatives
• Indented and executed scripts and other UNIX utilities; create, tune, and optimize stored procedures and DTS packages
• Follow documented procedures and develop new documented procedures for new technologies.
• Mounted file systems on remote servers using NFS Server & client configurations, performed disk configurations and crash recovery
• Installed and configured RPM packages for upgrades using YUM server.