Joseph Billingsley

Accomplished Senior Systems Engineer with over 13 years of experience specializing in the secure management of enterprise RHEL, Solaris and Windows environments for federal and large-scale corporate stakeholders. Expert in end-to-end Patch Management lifecycles and System Optimization. Proven track record of maintaining high-availability infrastructure through rigorous federal compliance standards and technical database queries for compliance reporting. I am also a Navy veteran.

Sr. Systems Engineer at Zione Solutions, LLC (2023-01 – 2025-12)

• Managed the strategic planning, design, and system optimization of the Internal Revenue Service Server Support and Services Division Oracle M7-8 environment.
• Coordinated comprehensive patch management cycles for RHEL and Solaris systems, ensuring 100% federal security compliance and operational stability.
• Responsible for the management of ZFS appliances to include patch management.
• Build, configure, administer, and maintain enterprise RHEL/Oracle Linux server environments, supporting production-critical infrastructure across large-scale environments.
• Executed Ansible automation playbooks to streamline infrastructure patching across large-scale heterogeneous server environments.
• Responsible for configuration management and infrastructure automation using Ansible across large-scale enterprise Linux/UNIX environments.
• Support KVM/QEMU virtualization, including VM provisioning, configuration, resource allocation, networking, storage, lifecycle management, and troubleshooting.
• Manage mail relays and restrict unauthorized SMTP relay.
• Troubleshot complex Linux/UNIX and Windows infrastructure issues, including OS failures, network connectivity, authentication, performance, disk/storage, application dependencies, and system configuration problems.
• Responsible for the configuration and management of Oracle VM for Sparc.
• Responsible for the installation and maintenance of the IPS for M7 patching.
• Responsible for the management of the ZFS storage appliances.
• Supported Windows and Linux integration, including Active Directory domain join/unjoin, authentication, DNS, network connectivity, and cross-platform infrastructure services.
• Managed Linux Logical Volume Manager (LVM) storage, including creation of physical volumes, volume groups, and logical volumes, performing live storage expansion, disk migrations, and filesystem resizing in production environments.
• Experience working with EMC and equivalent enterprise storage platforms in production data center environments.
• Troubleshoot network hardware connectivity and core infrastructure services including TCP/IP, DNS, DHCP, and NFS to maintain enterprise-wide reliability.
• Working knowledge of Kubernetes setup, configuration, deployment, and administration in Linux/DevOps environments.
• Created and maintained Dockerfiles to build standardized container images, including OS packages, application dependencies, configuration, environment variables, and startup commands.
• Supported production applications across complex infrastructure environments, troubleshooting dependencies between Linux/UNIX systems, networks, storage, databases, virtualization platforms, and application services.
• Performed root cause analysis of M7-8 environment.
• Managed vulnerability assessments using Qualys to identify open ports and secure system hardening for federal stakeholders.
• Managed the Oracle Enterprise Opscenter application for the M7-8 environment.
• Performed Linux kernel tuning for performance and stability.
• Delivered weekly status reports to team Projects leaders.

Sr. Systems Engineer at Macys Technology (2015-11 – 2022-12)

• Managed the design and support for high-performance Oracle Engineered Systems, including Exadata and associated Linux/Solaris operating platforms.
• Responsible for the daily administration of Oracle VM for Sparc, Solaris zones and LDOM’s.
• Responsible for the management of ZFS appliances to include patch management.
• Developed Ansible playbooks to support automated patch deployment and validation, reducing manual intervention and improving deployment speed.
• Working knowledge of multi-tier, highly available, and resilient application architectures, including web, application, database, networking, storage, and infrastructure layers.
• Developed reusable Bash and Python automation scripts for large-scale Linux environments, supporting server health checks, log analysis, software deployment, system configuration, and operational tasks across 1,000+ servers.
• Hands-on experience installing, configuring, administering, and troubleshooting UNIX/Linux and Windows environments across large-scale enterprise production infrastructures supporting 1,000+ Linux servers.
• Coordinated access management using CyberArk across complex Windows and Linux domain environments to maintain secure identity protocols.
• Configure SMTP services for sending and receiving email.
• Responsible for the management of Oracle Exadata servers to include patch management and daily monitoring.
• Supported EMC and equivalent enterprise storage solutions, performing LUN provisioning, zoning, multipathing configuration, performance monitoring, and storage-related incident troubleshooting in production environments.
• Developed maintainable automation scripts in Python, Bash, and Perl to optimize operational workflows and system reporting.
• Investigated and resolved 3rd level support tickets for the Supercluster environment, performing critical system optimization and troubleshooting.
• Troubleshot common Kubernetes issues involving pod failures, image-pull errors, networking, storage, resource utilization, node availability, and application configuration
• Performed root cause analysis of Engineered Systems environment.
• Managed the Oracle Enterprise Manager for Engineered Systems database environment.
• Installed vulnerability assessments using Qualys and LogRhythm to identify open ports and secure system hardening for federal stakeholders
• PCI DSS compliance and Security monitoring and logging solution.
• Adjusted kernel settings to improve system throughput, latency, and resource utilization.

Systems Engineer at Maximus, Inc (2013-02 – 2015-10)

• Supported mixed Solaris/Red Hat infrastructure for a team of 200 employees.
• Managed VMware/KVM virtual servers and performed performance tuning.
• Responsible for the creation and delivery of Oracle VM’s to support application and database projects
• Responsible for the Operating System patches of the Unix/Linux environment.
• Responsible for centralized internal time servers.
• Automated log rotation, backups, and environment checks using Bash and Python scripts.
• Responsible for the upgrade of Solaris 10 to Solaris 11.
• Coordinated migration of Oracle T-5 servers to new datacenter to include storage replication servers, ensuring data integrity and minimal service disruption.
• Executed rack-and-stack operations, network reconfiguration, and post-migration validation for Solaris enterprise infrastructure.
• Experience with using Nagios to monitor the Unix/Linux environment.
• Managed Unix/Linux environment utilizing Nagios tool.
• Assigned storage to Unix/Linux environment utilizing IBM/XIV tool.
• Documented technical procedures and made weekly status reports for management.

– UNIVERSITY OF MARYLAND

– MONTEREY PENINSULA COLLEGE