Over 7+ years of experience specialized in System Administration working on Redhat Linux, Cent OS,Ubuntu and Windows environments. Experience in Installation, Configuration, Patch management, Backup, Recovery, Maintenance, Support and troubleshooting system & performance issues of Linux systems. Experience in ensuring the security and compliance of the AWS environment is adhered while implementing and managing security measures such as identity and access management (IAM), encryption, network security, and compliance with industry standards and regulations.
Hi, I’m
NICHOLAS IGHALO
Newark,NJ
Summary
Overview
12
years of professional experience
Work History
Siemens Energy Oil, Gas
Linux System Administrator
01.2020 - Current
Job overview
- Responsible for Installation, configuration, troubleshooting and performance tuning of Linux based operating systems on a VMWare infrastructure platform
- Managed and set up appropriate partitions, file systems, network configurations, and security settings
- Responsible for managing more than 500 LINUX servers on prem and cloud
- Managing and configuring EC2 & S3 buckets in AWS
- Developed scripts using shell scripting languages like Bash to automate routine tasks like backup, patching and scheduling cronjobs and also writing and using Ansible playbooks for configuration management across the Linux environment
- Running Containerized Applications with Docker
- Maintaining the security of Linux systems by implementing and monitoring security measures such as firewalls, intrusion detection systems, and access controls
- Carried out user management responsibilities including creating new accounts, managing permissions and access rights, and enforcing security policies
- Installed and updated packages on all the servers using YUM, Apt-Get and managed packages through Redhat Satellite Server
- Installed, configured, and maintained services such as DNS, DHCP, NFS, Apache Web Server, Samba, SSH
- Managed disks and file systems using LVM
- Collaborate with other IT professionals, such as network administrators, database administrators, and developers for coordinating system changes, upgrades, and resolving complex issues
IBM
Linux System Engineer
01.2018 - 01.2020
Job overview
- Managed user accounts by creating sudo rules, supporting users, setting up new accounts and password resets
- Manage networking protocols TCP/IP, IPv4, and IPv6
- Monitor Zabbix for warnings, critical alerts, Troubleshoot
- Resolving package management dependency issue
- Troubleshoot and access log files for errors and web access traffic
- Performing installation, configuration, monitoring and troubleshooting of LAMP
- Managing physical, virtual, and network storage ( LVM's, NFS, SAMBA, MariaDB and NAS)
- Managing Linux Containers using Docker
- Building Docker images, pushing them to Docker registry
- Securing File using ACLs and Setting Security Enhanced Linux SELinux
- Writing bash scripts to automate tasks that are performed frequently on Linux servers
- Creating Ansible Yaml, Play-books, Roles, Bash Shell Scripts for application deployments
- Analyzing and interpreting system and application log files
- Maria database Installation and Setup
Combine Insurance
Linux System Administrator
01.2016 - 01.2018
Job overview
- Installed, upgraded and maintained the Linux servers, configuring required network on the virtual machines
- Troubleshooted system sluggishness due to CPU and network issues, improving performance by 35%
- Provided 24/7 support on Windows, Linux RHEL, and Ubuntu servers for 8,000+ users
- Resolved complex load balancing issue via phone for the global site, resulting in 100% client satisfaction
- Management of virtual servers on Oracle VMware
- Granting root permissions to users to perform certain tasks
- Performed standard system administration tasks such as troubleshooting and problem resolution, patching, installing packages using rpm and yum, drivers, software and hardware upgrades
- Customize, build, or patch Linux kernel and Installation and Configuration of Linux/Unix and Windows OS on VMware Server
- Installation and Configuration of APACHE , NGINX web Server
- Created and maintained system documentation, including configuration guides, standard operating procedures, and troubleshooting steps
- Configured volume groups and logical volumes, extended logical volumes for file system growth needs using Logical Volume Manager (LVM) commands
- Monitor system performance, analyze system logs, and proactively address issues - collaborate with cross-functional teams as needed
- Involved in daily incident management and resolved the day to day problems raised by the users and incidents which are logged by Event monitoring system.
Masters Energy Oil and Gas Group
IT Associate
01.2011 - 01.2016
Job overview
- Set up systems or Troubleshoot system and network problem
- Installing and configuring, manageable switches and firewall
- Provide remote training and support, including procedural documentation and relevant reports
- Responded to support requests from end users and patiently walked individuals through basic troubleshooting tasks
- Resolving TCP/IP network access problems for staff members
- Performance tuning and preventive maintenance and performed daily backup
Education
Ambrose Alli University
B.Sc. from Accounting
2007
University Overview
Skills
- Bash Shell Scripting
- RHEL 7/8/9, CentOS 6/7, Alma Linux 9 and Ubuntu 20//21/22
- Virtualization: Microsoft Hyper-V, Citrix Xen, VMware Esxi
- Automation/Deployment: Ansible, kickstart
- WebServer: Apache Tomcat 9/10, Apache, Nginx
- AWS: IAM, EC2, S3, VPC
- Data Bases: MariaDB-MySQL
- Firewalls: Iptables, Firewalld
- Storage: LVM, NAS, SMTP
- Package Managers: RPM, YUM, DNF
- Networking: TCP/IP, DNS, LDAP, NFS, NIS, SSH, FTP, DHCP, NFS, SCP, Samba
- Monitoring: Zabbix, Nagios, Cloudwatch
Timeline
Linux System Administrator
Siemens Energy Oil, Gas
01.2020 - Current
Linux System Engineer
IBM
01.2018 - 01.2020
Linux System Administrator
Combine Insurance
01.2016 - 01.2018
IT Associate
Masters Energy Oil and Gas Group
01.2011 - 01.2016
Ambrose Alli University
B.Sc. from Accounting
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