Linux Systems Engineer with Red Hat Expertise

RESUME

Nzeako Ogadinma

Linux System/Application Engineer

Email: *******@*****.*** Phone: 410-***-****

EDUCATION

BSC Sciences, University of Ife, Nigeria.

PGD Information/Computer Technology, Federal University of Technology Owerri, Nigeria.

M.S Information Technology (Information Assurance and Cybersecurity) Walden University, USA

CERTIFICATION\TRAINING

Certified Red Hat System Administrator, Network Security Certified,

Red Hat Enterprise Linux 4, 5, and 6 Enterprise training, Ubuntu Linux 10.4 and 12.4, A+, Sun Solaris 8, 9 and 10, VMware vSphere 6.5, Amazon Cloud computing.

TECHNICAL SKILLS

RedHat Enterprise Linux 5, 6, 7, CentOS 6 & 7, Oracle Linux, SUN Solaris 8,9 and 10, Ubuntu Linux 11.04, Oracle Linux 6, OpenStack, Puppet, Ansible, Git, SVN, WebLogic, Tibco, Red Hat Satellite Server, Foreman, Checkmk, Big Brother, Nagios, Cacti. TCP Wrappers, Tcpdump, Wireshak, Digital certificates, Firewall, SElinux, OSSEC HIDS, Nessus, Apache web server, Oracle http server, WebLogic application server, Tomcat, Clonezilla System Imaging and Recovery, WSSUS Windows offline Updates, LAMP, Logical, Volume Manager, Raid Technology, Networking, Ethernet bonding, VMware vSphere, Sun Solaris Zones, Shell Scripting(bash), DNS, NTP Microsemi system, Load balancing and proxy server, WebLogic, TIBCO

PROFESSIONAL EXPERIENCE

System/Application Engineer

March, 2020 Till now

GDIT/DHS

Arlington Virginia

Installed and managed RedHat Linux Enterprise systems 5, 6 and 7

Troubleshooting to resolve system and application issues for clients

Applied Red Hat System patches for improved security and performance.

Installed and configured software packages on Linux systems.

Used Ansible for configuration management and application deployment.

Wrote play books to automat tasks.

Managed system disks with logical volumes. Created logical volumes and

extended the logical volumes.

Carries out trouble shooting, and documents solutions.

Use Git for version control. Modified git repositories added them to git staging area and committed them to the git database. Merged codes, example master to nonop, nonop to operational. Reviewed codes written by peers before merging them.

Carried out automation of tasks using bash shells

Installation of WebLogic Server. Created WebLogic Domain and installed resources in WebLogic., updated ear files, war files and other applications on WebLogic.

Managed TIBCO application. Resolved problems with the application and ensured that all the processes are up and running.

Deployed WebLogic clusters on Non production and production environment.

Adjusted MaxThreadcount to specified count for WebLogic domains.

Managed resources in WebLogic using the admin console and command line utilities.

Managed paging space for SIT and verified status of free paging space

Implemented Q3 PSU WebLogic Patch and other patches.

Installed and configured GEMS. Used GEMS to monitor transactions.

Documented processes and tasks for future references.

Linux System Administrator

April, 2016 – Feb, 2020

NASA, Greenbelt, MD

System installation and administration. Installed and manages RedHat and

Oracle Linux systems.

System monitoring using UNIX native tools like TOP, Free, vmstat, df,

etc and others third party applications like whatisupGold application and Nagios, OSSEC HIDS etc.

Carried out system security administration. Involved in implementing

measures that ensure that all our systems and data are always secured.

Installed and managed software applications as per agency guidelines.

Used Ansible for automation and configuration management, wrote

playbooks to create and manage users, files, grant access and permissions to files and directories, install software applications and mount volumes etc.

Used Red Hat Satellite Sever to deploy, patch, maintain, and managed our

systems

Modified and simplified the NTP architecture of our environment and

carried out Microsemi NTP systems refresh for more effectiveness and to reduce cost.

Worked on method for updates, schedule of systems updates, and

successfully tested process in the dev environment, and implemented updates in operational environment.

Carried out file system management. Managed disk drives with logical

volume manager, granted permissions of files and directories to users.

Worked on a project to determine that our mail environment could

generate SMS and send alerts to operational supporting staff.

Installed and deployed the Marque for Adaptive display signs, created

messages, and transmitted them as needed.

Built the WIKI server for our project, and migrated data from the old

system hosting our documents to the wiki system to increase space, effectiveness and speedy retrieval of documents.

Created and used WSUS offline for updates of window machines.

Creating the concept of operations (ConOps) worksheet for the projects to

track and present new project for costumers.

Carried out documentation of processes.

Came up with the schedule of implementation for the wiki, NTP

replacements and restricted mail System projects.

Managed the mail system and carried out day to day support for our mail

systems.

Worked on networking problems, edited network files to connect

systems to the network

Captured network packets with tcpdump for analysis with tcpdump or Wireshark to help with troubleshooting network issues.

Carried out the change of SSL1024 bits certificates from the government

to 2048 bits commercial SSL certificates for our systems to meet government regulation.

Performed RedHat Enterprise Linux systems recovery with Clonezilla

imaging tool.

Audited RedHat Enterprise Linux and windows systems to prepare them

for scanning.

Involved in setting up a Test environment for our team.

Worked with SSHG to grant access to clients.

Carried out automation of tasks for projects.

Presided over tag team meetings.

Linux System Administrator

Jan, 2011 – March

, 2016

NOAA, College Park, MD

Carried out system updates according to the patching schedule for

Improved performance and system security

Used Foreman for provisioning servers. Involved in staging the servers

from development to production environment.

Worked with VMware EXSi 5 v.5. Created virtual machines, and

managed VMware vSphere environment with the vCenter server.

Used Big Brother, Checkmk, and Nagios to monitor systems and to help

with trouble shooting the systems.

Carried out scanning of systems with Nessus to identify vulnerabilities and

to remedy them.

Automated processes using shell scripting(Bash)

Implemented configuration management and automation with puppet.

Used Git for versioning control of codes. Participated in code review

before merging with git.

Modified git repositories, added them to git staging area and committed

them to the git database. Merged codes, example master to nonop, nonop to operational.

Reviewed codes written by peers before merging them.

Wrote puppet classes to create users, files, grant access and permissions,

mount volumes, and to make infrastructural changes.

Manages SVN users, created SVN users, added and removed them from

projects. Trouble shooting connectivity of users to SVN server and repositories.

Troubleshooting and resolving Red Hat server and workstation issues,

including booting, access, video card, networking problems etc.

Worked on networking problems, edited network files to help to connect

systems to the network. Made DNS entries for new systems.

User administration. Used LDAP to centrally manage users and systems.

Carried out memory and hard drive upgrades. Managed hard with logical volume manager. Created file systems and mounted them.

Provided technical support for our developers and other clients to help

them achieve their goals.

Gave permissions and ownership to files and directories to clients.

Mounted NFS volumes for users, and helped to create.

Worked with the other team members to set up a parallel backup center for our environment.

Deployed and un-deployed applications (WAR Files) on tomcat

Took weekly calls, solved problems and escalated them where necessary.

UNIX/Linux System Administrator

October, 2008 – December, 2011

QSSI, Colombia, MD

Installed and managed RedHat Linux 6, Oracle Linux 6 Centos 6, SUN

Solaris I0 servers

Trouble shooting and recovering RedHat and Sun Solaris Servers from

hardware and software failures.

Used shell scripting(bash) to script and automate processes.

Part of a team that migrated from Sun identity manager to Oracle identity

manager.

Installed and configured Oracle database server, Weblogic application

server, SOA, OIM.

Installed and configured LAMP, and managed servers of LAMP

architecture.

Disk installation and partitioning, created file system on the partitions and

mounted them.

Implemented RAID 5 on disk drives and mirrored root drives on RedHat

Linux servers.

Created scripts for backup and automated backup and other system tasks.

Implemented Ethernet Bonding on servers for redundancy and to increase

bandwidth.

Managed access to hosts and services with TCP Wrappers, Firewall and

SElinux.

Turned off vulnerable services on servers.

Installed and configured Apache web server, Oracle http and Load

balancer and proxy server.

Used shell scripting(bash) to script and automate processes.

Part of a team that carried out research for the best OS, software

applications, monitoring tools, and innovative practices, etc for our project.

I have carried out capacity planning on all servers.

Extensively documented change, projects and other procedures

Contact this candidate