Lancine Keita
San Antonio,TX
Summary
A highly skilled IT professional with 5 years of experience designing, managing, and supporting complex Linux-based environments. As a Linux System Administrator, I’ve consistently adapted to evolving tools, systems, and technologies while ensuring stability and performance across production operations. My expertise spans system management, troubleshooting, implementation, configuration, monitoring, and optimization of Linux Base OS and vendor-supported applications. Recognized for exceptional customer service, clear communication, and analytical problem-solving, I bring reliability, resourcefulness, and a results-driven mindset. A fast learner and self-motivator, I’m eager to apply and expand my skills in a challenging new environment.
Overview
4
4
years of professional experience
Work History
Senior Systems Administrator
Allied Universal Security Services
San Antonio, Texas
11.2021 - Current
- Deployed and maintained Visible Thread VTDocs application to enhance documentation workflows.
- Automated creation of Linux VMs in Azure and Hyper-V using BASH, Ansible, and Kickstart.
- Terraform Azure resources, including VMs, Kubernetes clusters, and PostgreSQL databases.
- Administered SLURM cluster for Bioinformatics team, optimizing performance and resource allocation.
- Executed HPC cluster OS upgrade from CentOS 7 to RHEL 9 to improve system stability.
- Deployed LIMS containerized application to AKS utilizing Helm for efficient management.
- Created comprehensive documentation and standard operating procedures in OneNote and Confluence.
- Mentored Junior Admins, fostering skill development and knowledge transfer.
- Managed user accounts and access controls for secure systems.
- Assisted in developing security policies to safeguard sensitive information.
- Collaborated with other team members to develop new system architectures to meet changing business requirements.
- Configured user accounts, permissions and access rights in accordance with company guidelines.
Education
RHSCA CERTIFICATE -
New Horizon
San Antonio, TX07-2025
Skills
- Patch Automation & Repository Hosting
Hosted internal BaseOS/AppStream repos on HTTPD and created custom repo files Automated dnf clean all && dnf repolist -v, reducing manual patching by ~90% across 50 VMs Performed post-patch smoke tests (services, firewall, SELinux) and documented rollback plans in Git - Network & Services Configuration
Configured static IP/DHCP via nmcli; deployed and validated BIND (forward/reverse zones) using named-checkconf, named-checkzone, and dig Hosted HTTPD with TLS/SSL on custom ports and troubleshot network flows using tcpdump - Security & Hardening
Managed firewalld (zones, rich rules) and iptables; resolved SELinux AVCs using semanage and restorecon to maintain enforcing mode Hardened SSH with key-only authentication, MaxAuthTries, and AllowUsers Deployed Fail2Ban for brute-force protection and configured basic auditd rules for monitoring - Storage & Filesystem Management
Provisioned LVM (PV/VG/LV) and extended volumes live using fs_grow without downtime Configured persistent mounts via /etc/fstab and enforced disk quotas for shared volumes
- File Services & Mount Automation
Exported NFS shares and implemented AutoFS maps across multiple hosts, eliminating stale mounts and manual remounts through automated failover handling - Containers & Service Automation
Built and tagged rootless container images with Podman/Docker Created user-level systemd units with linger for auto-start on reboot and optimized boot sequences using systemd-analyze - Monitoring & Logging
Deployed Nagios Core with custom plugins (HTTP, SSH, load, processes, swap, user count) Standardized chronyd configurations and added NTP drift checks Implemented consistent logrotate and logger policies for reliable audit trails - Scripting & Configuration Management
Developed Bash scripts for automated backups (files >4 MiB), system health checks, and cron scheduling Logged outputs via logger for centralized review Authored Ansible plays for HTTPD deployment and SELinux port mapping; applied Python/SQL for basic system reporting
Timeline
Senior Systems Administrator
Allied Universal Security Services
11.2021 - Current
RHSCA CERTIFICATE -
New Horizon