Luis Francisco
Longwood,FL
Summary
Experienced Linux Systems Engineer with a 7+ years of strong background in supporting both physical infrastructure and hybrid cloud environments. Proven track record deploying and hardening RHEL systems, automating provisioning with Ansible, and managing patching lifecycles using Red Hat Satellite. Skilled in remote hardware management, firmware/BIOS tuning, and building scalable on-prem solutions. Adept at resolving complex OS, networking, and compliance issues across production systems in fast-paced, 24x7 environments. Known for bridging infrastructure, automation, and operational support with a hands-on, detail-driven approach.
Overview
10
10
years of professional experience
1
1
Certification
Work History
Sr. Linux Administrator
Navient
01.2024 - Current
- Provided and supported a highly available, scalable 24x7 Red Hat Enterprise Linux environment across AWS and on-prem systems, ensuring uptime and performance for production workloads.
- Built and maintained Ansible playbooks for automated patching, provisioning, and compliance; integrated with AAP/Tower and Git for version-controlled deployments.
- Managed full patching lifecycle using Red Hat Satellite, including content view creation, errata deployment, system registration, and OS upgrades via Red Hat in place upgrades (Leapp)
- Configured and troubleshot RHEL networking, including DNS, routing, bonding, firewalld, and AWS security groups; handled system backups using rsync, cron jobs, and internal backup tools.
- Maintained STIG-compliant systems using OpenSCAP and Ansible; validated remediation through Tenable and Nessus scans while supporting onboarding, troubleshooting, and vulnerability resolution across Linux systems.
Linux System Engineer
Rotech
03.2023 - 01.2024
- Deployed and configured Red Hat Satellite on hardened RHEL 8 EC2 instances in AWS, managing subscription manifests, lifecycle environments, and DNS integration for automated patch management across hybrid infrastructure.
- Enabled secure HTTPS communication and compliance with SSL certificate implementation on Red Hat Satellite, integrating Capsule Servers to scale patch delivery across regions.
- Built and maintained Ansible controller nodes in AWS with CI/CD integration, using role-based access control and GitOps workflows to drive infrastructure-as-code automation.
- Remediated repository sync issues and implemented Kickstart automation to streamline provisioning, OS hardening, and package deployment tailored to cloud-specific environments.
- Resolved SSH, SELinux, and firewall issues on RHEL EC2 hosts; applied vulnerability fixes based on Tenable/Nessus scans, and enforced compliant traffic rules using AWS security groups.
Linux Systems Administrator
Highmark Health
09.2018 - 09.2023
- Managed BIOS, RAID, and firmware configs on bare-metal servers to support OS tuning and hardware compatibility.
- Provisioned UCS service profiles for consistent server identity, boot policy, and network configuration.
- Utilized iDRAC/iLO remote consoles to troubleshoot boot failures, file system errors, and recover unresponsive servers.
- Installed and maintained VMware ESXi on physical hosts; configured VM networks, datastores, and host patching.
- Created RHEL Kickstart images for automated deployment across datacenter environments with varying hardware.
- Performed diagnostics on hardware faults, including DIMM failures, disk issues, and fan/PSU alerts via OEM tools.
- Configured bonded NICs, VLAN tagging, and static routing on on-prem servers for high-availability networking.
- Managed physical-to-virtual (P2V) migrations and server decommissioning lifecycle with change management teams.
- Collaborated with facilities and DC ops for rack/stack coordination, cable tracing, and power zoning across cabinets.
Linux Systems Analyst
Stoltenberg Consulting
01.2016 - 09.2018
- Delivered 24x7 enterprise‐grade Linux administration and incident response for a fleet of 1,500+ RHEL/CentOS servers, including kernel‐level troubleshooting, systemd analysis, and SELinux policy validation enterprise Linux operations.
- Administered user accounts, RBAC permissions, and SSH key management through LDAP/IdM integration, PAM configuration, sudo policy enforcement, and secure access governance identity and access control management.
- Automated large‐scale OS provisioning using PXE, Kickstart, and templated configuration workflows to standardize baseline builds and accelerate server deployment automated provisioning pipelines.
- Monitored system performance and resource utilization using tools such as top, sar,vmstat, journalctl, and tuned profiles while maintaining detailed runbooks and operational documentation performance monitoring and documentation.
Skills
- Systems: Linux (RHEL, CentOS, Fedora), UNIX, Windows
- Automation: Ansible (playbooks, roles, Tower), Bash, Python
- Cloud & Virtualization: AWS, VMware vSphere / ESXi
- Networking: TCP/IP, DHCP, DNS, SSH, SFTP, firewalls
- Monitoring & Tools: Nagios, Splunk, Grafana, Prometheus, Datadog, Xymon, ServiceNow
- Databases: Oracle, MySQL
- System Security
Certification
- Red Hat RHCSA, RHCE (Currently Pursuing)
- CompTIA A+, Network+, Security+, Linux+
- AWS Solutions Architect
- Cisco CCNA
Timeline
Sr. Linux Administrator
Navient
01.2024 - Current
Linux System Engineer
Rotech
03.2023 - 01.2024
Linux Systems Administrator
Highmark Health
09.2018 - 09.2023
Linux Systems Analyst
Stoltenberg Consulting
01.2016 - 09.2018