System Administrator Network Services

Saidi Zakari Osseni

Linux System Administrator

**********@*****.*** • 267-***-****

LinkedIn • Philadelphia, PA

Innovative and technically sophisticated professional with robust experience in deploying, configuring, maintaining robust Linux environments to ensuring enhanced system reliability and performance.

Instrumental in RHEL, CentOS, Debian systems; demonstrates advanced shell scripting, automation with Ansible, and virtualization with VMware, KVM aimed at achieving streamlined operations and reducing manual tasks. Recognized for managing network services, including DNS, NFS, Apache, maintaining uninterrupted network connectivity, and optimizing server responses. Skilled in security enhancements through SELinux, firewall configurations to fortify systems against potential security threats. Adept at performance tuning, troubleshooting, preventive maintenance to ensure high system availability and optimal operation.

Areas of Expertise

Server Installation & Configuration

System Security Enhancements

Network Services Management

Virtualization Technology Mastery

Automated System Maintenance

Performance Tuning & Optimization

Advanced Shell Scripting

Firewall & SELinux Configuration

DNS & NFS Management

Apache Server Administration

Troubleshooting & Problem Solving

Linux Environment Deployment

Professional Experience

DoorDash, Inc., Philadelphia, PA

UNIX/Linux System Administrator

2022 — Present

Secure and control access to system resources by administering user and group configurations, file security, authentication, and access management (SSH, Firewalls). Maintain seamless network services by configuring and troubleshooting DNS, NFS, HTTPDS, LDAP, and Samba servers in multi-platform LAN environment. Safeguard systems against unauthorized access and security threats by enforcing security policies using FIREWALL and SELinux protocols.

Key Contributions/Achievements:

●Enhanced system performance and security compliance through meticulous management of Linux server installation, configuration, updates, upgrades, and patching.

●Boosted server stability and reliability by building and maintaining servers running RHEL 7, 8, and 9.

●Increased operational efficiency by developing Bash shell scripts for automated server management.

●Optimized web service delivery and database performance by installing and configuring Apache HTTPDS and MySQL.

●Improved system resilience and reduced downtime by creating Ansible playbooks for system patching and maintenance across hundreds of hosts.

●Minimized system disruptions and enhanced user satisfaction by addressing and resolving hardware and software issues for RHEL and CentOS systems.

●Improved resource allocation and system scalability by managing virtualization environments using VMware ESXi and KVM.

OTI Telecom, Cotonou, Benin

Linux Administrator

2018 — 2022

Ensured robust and scalable server infrastructure by building and deploying servers running CentOS 6.x, 7.x, and RHEL 6.x, 7.x. Ensured uninterrupted network connectivity and services by configuring and troubleshooting TCP/IP, DHCP, DNS, NFS, and CIFS services. Maintained system integrity and minimized operational risk by performing log administration to detect and resolve system errors.

Key Contributions/Achievements:

●Enhanced user experience and system reliability by administering user accounts and resolving customer issues through effective troubleshooting.

●Achieved improved system efficiency and resource utilization by monitoring and optimizing server performance with appropriate tools.

●Optimized storage management and data retrieval by managing file systems using LVM and performing file archiving and compression with gzip, tar, and bzip.

●Bolstered system security and software integrity by configuring key-based authentication for SSH and managing software packages from Red Hat Network.

Education & Certifications

Bachelor of Science, 2017 – Benin Republic University, Benin

Certifications: Red Hat Certified Engineer (RHCE), In Progress Red Hat Certified System Administrator (RHCSA), 2024

Technical Skills

Operating Systems: Red Hat Linux CentOS

Networking Protocols: TCP/IP NFS SSH DNS DHCP CIFSOn

Systems Administration: Linux Administration Configuration & Troubleshooting System Security & Performance System Monitoring

Scheduling & Patching Virtualization: VMware ESXi VMware VM VirtualBox

KVM Programming/Scripting Languages: Bash Shell Scripting Ansible

Technical Skills: UNIX Linux Shell Scripting Docker Podman RHEL 6, 7 & 8 VMware ESXI KVM LVM HTTPD LDAP SAN NAS TCP/IP Red Hat Satellite DHCP DNS NFS SAMBA Mysql MariaDB Nagios service now SharePoint AWS PostgreSQL AD Ec2 S3 HA

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