Abubakar Mohammed

Phone: 412-***-**** Email: ac7kxd@r.postjobfree.com

Summary:

9+ years of IT Professional Experience in the Technical Support and Administration of AIX, Linux (RedHat & SUSE), VMware on various hardware platform. Very good understanding of change management and datacenter practices, working with application, storage and network teams to design, build and manage systems for efficiency handling workloads and always use the best practices and policies of the organization technology vendors. Have confidence to complete the assigned task within the scheduled time, quick learner and positive attitude.

Professional Experiences:

Experience in installation, configuration, tuning, security, backup, recovery and upgrades of IBM AIX Hardware Power5 to Power8, Linux (RedHat & SUSE) and VMware.

Extensive experience in Installation, Configuration, Maintenance and Administration of AIX OS 5.2, 5.3, 6.1, 7.1, RHEL OS 4/5/6 & 7, SUSE OS 8/9/10/11, CentOS, Fedora, Ubuntu, and Windows 2003, 2008 and 2010 servers.

Experienced in new builds from scratch on IBM AIX, Linux (RedHat & SUSE) servers.

Designed and Performed Installation and Kick start over network and created, maintained installation server, boot server and profile server.

Extensively experienced in upgrades and security patches on IBM AIX, Linux (RedHat / SUSE) and Fedora servers.

Experienced with the installation and configuration on Apache 2.x, 1.3x, 1.2, JBoss 4.0x, ATG Web Servers and BEA Web Logic 8.x, 9.x servers.

Good knowledge on Kernel Installation/Configuration and accessing APIs (Fork, IOCTL etc).

Good Knowledge on Network and File system performance OS parameters.

Experience in Installation & Configuration of Network Print Servers on IBM AIX, Linux (RedHat & SUSE) servers.

Installation/Administration of AIX, Linux (RedHat/SUSE) servers running on a LAN with full setup of network services and protocols, ensuring the proper implementation of the TCP/IP Stack, and ARP/RARP routing, and network functionality.

Database Administrator for DB2 in z/OS environment.

Expertise in application development support activities including database design, optimizing SQL queries, building complex SQLs, dynamic SQLs and triggers, effective binding of packages and plans, concurrency planning, data refreshing and database objects migration across regions.

Designed, tested and debugged external and DB2 native stored procedures. Worked with remote stored procedure calls.

Extensive experience in utilities and tools used for database monitoring (DB2 traces, online performance monitors, reports, EXPLAIN, DB2 catalog queries), data movement and organization (LOAD, UNLOAD, REORG), data consistency utilities and catalog manipulation utilities (RUNSTATS, MODIFY, STOSPACE), etc.

Competent and experienced in using IBM utilities, Omegamon and other third party tools like CA/DB2 tools (platinum products), TMON, Omegamon and BMC tools.

Experienced and programmed REXX tools to simplify database administration.

Proficient in daily support activities which include maintaining and testing backups, monitoring logs, monitoring thread activity, resolving job abend issues, locking issues and contentions, scheduling administration activities.

Knowledge and experience in data modelling, normalization and performance tuning of applications and database design.

Co-ordinated and actively worked in database version migrations DBA support team.

Configuring and administration of NFS server and NFS client.

Configuring & Installing Simpana CommVault (backup tool) across all the DTQ and production servers.

Responsible for setting up disaster recovery environment for Red Hat Linux servers and implemented all the DR procedures as per the guidelines.

Ensured system security by hardening and auditing the systems as per guidelines in Red Hat Linux also experienced in system analysis, troubleshooting and performance tuning of operating systems.

Basic scripting done in Korn, Ruby, Bash, Python, chef, CSH and Perl for automated tasks.

Experience in Installing and Configuration chef on Linux Servers.

Managing Linux servers using chef.

Extensively worked on Server Health checkup using top, nmon, topas, iostat, vmstat etc.,

Worked extensively on installing configuring ESXi for implementing VMware systems.

Monitoring scheduling ESX hosts using VMware vSphere client.

Worked on the ESXi components such as VMware High availability, VMware distributed resource scheduler, VMware data recovery, VMware vSphere, vCenter, vMotion etc.,

Designed and implemented Veritas Cluster management suite for high availability.

Worked on Veritas backup implementation.

Extensive knowledge on File System Management on Linux (RedHat & SuSE), IBM AIX servers. Worked on load balancing and high availability using Red Hat cluster services.

Installed and configured Oracle Enterprise Linux (OEL).

Monitoring and troubleshoot backups and schedule Cron jobs.

Extensive experience in Mail Server, Samba Server, Apache, Jboss, IIS Servers.

Worked on Windows Active Directory and Domain controller.

Configured GFS (Global File Sys) for implementing high availability and Cluster environment.

TECHNICAL Skill:

Hardware:

IBM RS/6000, IBM AS/400, SUN E-3000, E-4000, HP 9000/750,

IBM p5 550, IBM p6 570,580,595 IBM p7 770,780,795 & P8 8286. VMware ESX/ESXi/VMFS. HP ProLiant DL380, 385, 580, 585.

Operating Systems:

IBM AIX (5L, 6.1, 7.1) Linux (Redhat 5/6,7 SUSE 8/9/10/11),

Windows 2003/08/12/16 / NT4.0, Sun Solaris 7/8/10,11,

HP-UX 10x & 11.x.

Tools:

Active Directory, Veritas Backup, Veritas Volume Manager, Commvault backup, Storix backup, TSMbackup, NAS, SAN & Nagio’s.

Languages:

JavaScript, HTML, C, VB, Perl and Korn Shell programming, Chef, Ansible & Puppet.

Databases:

Oracle 7.x/8.x/9.x/10.x,11.x, DB2, MS SQL SERVER 7/8/11/16.

Networking:

TCP/IP, DNS, DHCP, and Cisco Routers/Switches.

Web / App Servers:

IBM Websphere 4/5, BEA Weblogic, Apache, IBM HTTP webserver.

Tape Libraries:

IBM 3584 / TS3500, IBM 3494, IBM 3582, IBM 3200.

Ticketing tools

REMEDY, HPSM & SERVICE NOW.

Education:

Master’s in Information System from Concordia University Wisconsin.

IBM Certified System Administrator - AIX 7.1.

Bayer Corporation, Pittsburgh, PA March 2016 to till date

Role: Sr. Unix / Linux Engineer

Responsibilities:

Installation, configuration and Operating System upgrade on, Red Hat Linux 3.x, 4.x, 5.x, 6.x and Sun Solaris 8,9,10

Installation, Configuration, and OS upgrades on RHEL 5.X/6.X/7.X, SUSE 11.X, 12.X.

Implemented and administered VMware ESX 3.5, 4.x for running the Windows, Centos, SUSE and Red Hat Linux Servers on development and test servers.

Creating volume groups, Logical volumes and extending them using LVM.

Working with HP XEN Blade Servers. Attaching disk space from DL-360 blade servers to VMs.

Installed and managed VMware ESX 4.5 hosts running RHEL 5,6 versions.

Installed, configured, and maintained WebLogic and Oracle DB Servers on OS Redhat Linux and AIX.

Responsible for setting up new instances, migrating existing services from physical servers to AWS cloud.

Configure, monitor and, maintain AWS VPC environment.

Working with SAN team for exporting shared volumes and mounting shared volumes.

Installing and Configuring Puppet for configuration management.

Responsible for configuring networking concepts like NIS, NFS, SAMBA, LDAP, SSH, SFTP, SNMP, DNS, DHCP, troubleshooting network problems such as TCP/IP, supporting users in solving their problems.

Configuring, Managing and Scheduling CRONTABs for App Accounts and Backup management on a regular basis.

Installed and configured Splunk for all kind of Application, System logging so that various support team can get information online instead of combing the log files.

Installed and configured Apache Web Server.

Installed and deployed WebLogic and WebSphere Application Servers (WAS).

Experienced in administering Linux Work Stations and Linux Cluster HPC systems.

Exposure to the design, development, installation, test and operation of hardware (COTS/GOTS) components for High Performance Computing systems.

Working experience with networking in an HPC environment including 10GbE and InfiniBand and Intel Omni Path architectures.

Experience with parallel file systems and storage protocols.

Worked on Puppet to organize and execute configuration plans on servers& worked on modules of Puppet for its manifests on servers.

Create, maintain and manage automated build processes for AWS environment using Puppet.

Basic scripting done in Korn, Ruby, Bash, Python, chef, CSH and Perl for automated tasks.

Experience in Installing and Configuration chef on Linux Servers.

Managing Linux servers using chef.

Developed scripts for automating administration tasks like customizing user environment, and performance monitoring and tuning with nfsstat, netstat, iostat, and vmstat.

Created BASH shell scripts to automate cron jobs and system maintenance. Scheduled cron jobs for job automation.

Installed Deployment & system configuration Automation JIRA, HPSA and Puppet server.

Modifying user’s password policies, group policy, UID and GID assignment policies.

Monitored the performance of the system using top, sar, ps, prstat, vmstat, netstat, iostat, and cpuinfo to check the CPU utilization, bottlenecks of I/O devices, memory usage and network traffic.

Troubleshoot network connectivity used ping, netstat, ifconfig, and trace route commands. Login to the remote system using sudo, putty, and telnet. Transfer files across the systems on the network used ftp, scp, and rsync commands.

Linux technical support and prepared technical documentation for check in verification.

Regular backing up of critical data and restoring backed up data. Worked in solving tickets issued on day to day activities and problems related to development and test servers.

Working knowledge on ITSM remedy and Maximo ticketing systems.

Provided 24x7 System Administration support for Red Hat Linux and CentOS servers and resolved trouble tickets on shift rotation basis.

Provide support for building servers, patching, user administration tasks, deployment, software installation, performance tuning and troubleshooting and KVM.

Environment: Red Hat Linux 3,4,5,x 6 VMware ESX 3.5, vCenter 5.1, ESXi 5.1, Windows Server 2008 R2,sun Solaris 8,9,10, Solaris Volume Manager, Veritas Cluster Server, Weblogic 8.1, Samba, Oracle 9i/10g, HP DL 385 G6, HP DL380 G7.

Deloitte Lake Mary, Florida Nov 2015 to Feb 2016

Unix / Linux System Administrator

Responsibilities:

Installation, configuration and administration of RHEL 5.0/6.0 and Centos 5 and 6 using Kickstart, Jumpstart, custom configuration like package management, volume management of servers.

Applied appropriate support packages/patches to maintain system integrity.

Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands.

Creating, installing and configuring Zones, LDOMs in Sun Solaris 10.

Creating file system, exporting, importing file systems, tuning, growing, shrinking using Veritas File system 5.x.

Troubleshooting and administering High Availability using VERITAS Cluster Server on various business critical database & application production servers.

Used puppet, python to configure servers manages profiles, push changes, writing manifests.

Monitored Linux server for CPU Utilization, Memory Utilization, and Disk Utilization for performance monitoring.

Troubleshooting and configuring NAS and NFS mount points.

Performed capacity analysis, monitored and controlled disk space usage on systems.

Monitored system activities and fine-tuned system parameters and configurations to optimize performance and ensure security of systems.

Administration for multiple sun hardware, this involves creating domains, adding/deleting system components.

Installing, configuring Veritas Netbackup 6.5 on Solaris, Redhat servers, creating polices, scheduling jobs.

Installed Web Logic 10.3 and configured Domains, Admin and managed servers for Applications to be deployed.

Extensively used Active Directory Server Console for managing the entries.

Monitoring system resources, logs, disk usage, scheduling backups and restore.

Configuring SUDO and granting root permission to users for performing certain activities.

Installation, maintenance and administration of Oracle and Db2 Server on Linux Servers.

Creation, Management, Administration and Maintenance of virtual servers and clients.

Experience in troubleshooting SAN related issues and firmware upgradations of SANs in VMWare and different environments.

Designed and implemented Veritas Cluster management suite for high availability.

Server Build using Jumpstart, Kickstart, and TPM.

Tracking the Application Work flow in the Back end which are running on Oracle DB.

Trouble shooting Issues with the Live Linux and Application servers.

Applied Materials, Gloucester, MA Jan 2013 to Oct 2015

Varian Semiconductor Austin, Texas

Sr. Unix / Linux Administrator

Responsibilities:

Identifying and troubleshooting the problems related to operating system and hardware.

Coordinate with Hardware and Software Vendor for any break fix issue and schedule downtime with application owner.

RHEL 3/4/5/6, SUSE 8/9/10/11, CentOS, Fedora, Ubuntu servers.

Perform NT and UNIX Network System Administration, including adding NT and NIS domains, creating new users and groups with multi-levels of security, creating assign file attributes & permissions, defining network protocols, insuring TCP/IP and router connectivity.

Monitored system performance with conventional tools like SAR, IOSTAT, NETSTAT, NMON, TOPAS, etc.

Database Administrator for DB2 in z/OS environment.

Expertise in application development support activities including database design, optimizing SQL queries, building complex SQLs, dynamic SQLs and triggers, effective binding of packages and plans, concurrency planning, data refreshing and database objects migration across regions.

Designed, tested and debugged external and DB2 native stored procedures. Worked with remote stored procedure calls.

Proficient in daily support activities which include maintaining and testing backups, monitoring logs, monitoring thread activity, resolving job abend issues, locking issues and contentions, scheduling administration activities.

Knowledge and experience in data modelling, normalization and performance tuning of applications and database design.

Co-ordinated and actively worked in database version migrations DBA support team.

Responsible for Storage Administration duties involving zoning, masking and storage provisioning for the hosts and connecting them across the SAN for software and firmware Upgrades.

Hands-on experience in configuring NAS, NFS, NIS network environment.

Exposed in Network Administration with Storage, Backup/Recovery and SAN elements.

Maintained availability, increased capacity & performance of production machines by upgrading their hardware (disks, CPU, memory, i/o board, power cooling unit, mother board etc).

Installation, configuration DB2 UDB & IBM HTTP server with SSL for secure communication & providing technical support to users.

Install and configure DB2 Client with Client Configuration.

Symantec NetBackup backup and log archive configuration.

VM server ESXi 3.x installation, configuration and administration.

Troubleshooting and desktop support of the VMWare Vsphere 4.01/4.1.

Setup Virtual Test Environment using VMWare ESXi 4.1 (Cisco UCS).

Server builds from scratch using jumpstart, kickstart and TPM.

Cluster expert for VSM with SFCFS and CFS, assisted support in this area.

Configuring different system such as Oracle, ASM (RAC, VCS, CFS and middleware application on Linux (RedHat 5/6 and SUSE10/11).

Provide remote support for Linux (RedHat and SUSE) servers and maintaining SLA’s, performance tuning and enhancing.

Customizing the applications according to the business requirements.

Worked in server management services with best practices maintaining service level objectives (SLO’s).

Manage project for setting up for IT infrastructure, providing 3rd level support for Linux (RedHat/SUSE) environment and setting up EMC storage.

Third party application support, performance, tuning and vendor management.

Configured (HTTP’s) on Apache IIS 6 & 7 on Web Logic.

Manage loading balancing on F5 Load balancer across data centers.

Prioritizing the task and resolving tickets on remedy and SNOW.

Troubleshooting issues with live Linux and application servers.

Build Linux from scratch (RedHat and SUSE) for creating new dev/test environment for application servers.

Managing cron jobs, batch processing and job scheduling.

Experienced in Installation and configuration of Red Hat Enterprise Linux servers.

Experience with Red Hat Linux builds methodologies, performance tuning, memory management, server maintenance and troubleshooting.

Support the storage backup team with any issues related to the operation of backups, archiving, and job management.

Installation of backup agents, configuration of media severs and tape libraries.

Walgreens Corporation, Lincolnshire, IL Sept 2012 – Dec 2012

AIX / Linux System Engineer

Responsibilities:

I have worked with Walgreen’s through TCS and below are the activities that I have covered through Knowledge Transition, Shadowing and also performed few activities.

Daily tasks included dealing with AIX side of SAN. Like troubleshooting Fiber card adapter, replacing Fiber card adapters and LUN’s Configuration.

Understanding of SAN and NAS storage.

Dealing with user id deletion with removing entries from CRONTAB.

Performed process automation, scheduling of processes using CRON jobs.

Created and maintained filesystem by increasing the space and running FSCK’s.

Installed and configured Sudo for users to access the root privileges.

Experience using LVM creating VGs, LVs, and disk mirroring.

Troubleshooting in AIX Environments 5.3, 6.1 & 7.1.

User management, security planning and implementation.

Used Secure4access for AIX user management.

Writing Shell scripts for automation of job, system monitoring and error reporting.

Lowe’s Corporation Inc., Mooresville, NC Aug 2011 – Aug 2012

UNIX / Linux Engineer

Responsibilities:

Responsible for installation, configuration, support and troubleshooting existing systems in AIX 5.X, 6.1.

Installed and configured AIX 5.3, 6.1 on Pseries 520, 550, 560, 561, 570, 590, 595, 770.

Installation & Administration of Redhat Linux server and Workstation.

Migrated HACMP 5.2 to HACMP 5.4.

Experience using LVM creating VGs, LVs, and disk mirroring.

Migration and upgrade from AIX 5.3 to AIX 6.1.

User management, security planning and implementation.

Installation, Configuration & Upgrade of AIX operating systems running oracle Database.

Performing Failovers in HACMP / cluster environment, monitoring servers.

IBM XIV storage management.

Migration and upgrade of client software when needed from AIX TSM servers to Linux based servers.

Configuration & Administration of IBM Tivoli Storage Manager Servers.

Defining of New IBM TSM Servers to TSM Library Manager and TSM configuration Manager.

TSM database and Recovery log management like defining additional volume and mirroring of TSM data base and recovery log.

Planning TSM Job schedules to take periodic backups of production, development and test servers. Monitoring of Performance and backup timings.

Restoring of one server data to other servers through TSM.

Install and configure Red Hat Enterprise Linux 5.x with security hardening.

Install and configure RHEL Guest OS (VM) on VMware ESXi and manage VM hosts.

Configuration and Administration of DNS, NIS, NIS+, NFS, DHCP, FTP, Samba Servers and clients. Security layers like SSL, SSH, HTTPS, SFTP.

Configuration and administration of mail server, Send mail, and SNMP/POP.

Writing Shell scripts for automation of job, system monitoring and error reporting.

Configuration of Hardware and Software RAID. Disk replacement and File system recovery.

Worked on installing and managing IBM RS/6000/Pseries with DB2 and Oracle.

Install and configure DB2 Client with Client Configuration.

Symantec NetBackup backup and log archive configuration.

I have also configured DB2 to run on an HACMP cluster during failover by matching /etc/services port assignments and user and group numbers between nodes in a cluster.

Installed, configured and upgraded symmetrical multi-processing systems.

Worked on Unix/Linux Email gateway server with Qmail & Sendmail.

Enterprise Consulting Group, St. Louis, MO Oct 2010 – Aug 2011

Unix System Administrator

Responsibilities:

Responsible for installing, configuring and maintaining AIX servers.

Extensive use of LVM, creating Volume Groups, Logical volumes, and disk mirroring.

Configured and administrated VIO server and VIO clients.

Administration Task’s included User administration, Performance, Sendmail. Weekly mksysb. Daily roles included dealing with LVM extensively. Strong hold of LVM.

Migrated AIX 5.3 with HACMP 5.1 to HACMP 5.2 (online).

Daily tasks included dealing with AIX side of SAN. Like troubleshooting Fiber card adapter, replacing Fiber card adapters and LUN’s Configuration.

Setup of full networking services and protocols on UNIX, including NIS/NFS, DNS, SSH, DHCP, NIDS, TCP/IP, ARP, applications, and print servers to insure optimal networking, application, and printing functionality. Installed and configured Sudo for users to access the root privileges.

Installed application connectivity software to enable IBM print services. Configured and administered firewall rules, including the use of SNORT, NMAP to effectively monitor system files, port security, and network traffic activity coming through the firewall.

Administered Linux servers for several functions including managing Apache/Tomcat server, mail server, MySQL database, and firewalls in both development and production.

Migrated database applications from Windows 2000 Server to Linux server.

Installing and setting up Oracle9i on Linux for the development team.

Wrote shell scripts for automated installations, to extract logs.

MetLife Inc., New York Jun 2009 – Aug 2010

Linux System Administrator

Responsibilities:

Administration of IBM AIX, Sun Solaris and Linux RedHat application and database servers. Installed/Maintained AIX systems 4.x & 5.x.

Worked with Oracle, Web groups in maintaining and problem solving in applications and OS. Supported multiple RS6000 Systems and SUN/Solaris Systems.

Created logical volumes (mirrored/stripped) in SSA disks.

Involved in Disaster Recovery, DataStage Upgrade, Unix Infrastructure, WebSphere.

Done revision review for Shell Scripts. Written for variety of Unix Administration.

Created and maintained user accounts on UNIX Systems.

Installed and configured the Oracle 8i Database on Sun Enterprise 6500,450 Servers for staging and Production boxes.

Troubleshooting the Kernel, Loader, Assembler and Compiler errors.

Installed, Configured and Management of Mail Servers, DNS.

Developed shell-scripts (Perl) to automate routine activities.

Configured NFS, NIS on Servers on Production boxes.

Configured TCP/IP backup restore and storage management.

Created users on the server for public and private ftp access to the site.

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