Linux Infrastructure Administrator
LINUX INFRASTRUCTURE ADMINISTRATOR
Professional Summary
Systems and network administrator with experience designing, securing, and supporting infrastructure across higher education, government, and small-business environments. Experienced in Linux administration, centralized identity and authentication, KVM virtualization, mdadm and LVM storage management, VLANs, firewalls, VPNs, monitoring, backup and recovery, and Bash-based automation. Designed and supported multi-user environments using OpenLDAP, Kerberos, PAM, Samba, LTSP, pfSense, OpenVPN, Nagios/Icinga, Bacula, and other open-source technologies. Currently completing an Associate of Applied Science in Cybersecurity and Network Systems while updating and expanding existing infrastructure and cybersecurity skills.
Core Qualifications
- Linux systems and infrastructure administration
- Centralized identity, authentication, and access management
- OpenLDAP, Kerberos, PAM, Samba, SSO, and OAuth
- KVM/libvirt virtualization and virtual machine administration
- Linux storage administration using mdadm software RAID and LVM
- TCP/IP, VLANs, DNS, DHCP, firewalls, NAT, and VPNs
- pfSense firewall and OpenVPN administration
- Network file shares, backup, recovery, and restore testing
- Bash scripting, cron-based automation, and Python fundamentals
- Nagios/Icinga monitoring, SNMP, and operational alerting
- Network segmentation, system security, and access control
- Technical documentation and independent infrastructure ownership
Professional Experience
Co-Owner / Systems & Network Administrator
Worker-Owned Restaurant Corporation | Athens, Ohio | 2004–2013
Designed, administered, secured, and supported the organization’s Linux-based servers, workstations, networks, identity services, email systems, virtualization environment, storage, monitoring, and backup infrastructure for approximately 90 users.
- Linux Administration: Administered Linux servers and approximately 20 centrally managed Linux workstations, including system configuration, authentication, permissions, patching, troubleshooting, and lifecycle support.
- Linux and Open-Source Migration: Led an organization-wide migration from Windows and Microsoft Office to Linux and OpenOffice.org. Implemented Linux Terminal Server Project (LTSP) infrastructure to centrally manage workstations, improve stability, reduce endpoint vulnerabilities, and avoid substantial licensing costs.
- Identity and Access Management: Implemented centralized identity and authentication using OpenLDAP, Samba, Kerberos, and PAM. Enabled Single Sign-On (SSO) across Linux workstations and internal applications and supported Google Apps integration through OAuth.
- Virtualized Infrastructure: Deployed and administered an on-premises KVM/libvirt virtualization environment hosting critical business, development, email, monitoring, and infrastructure services.
- Storage Administration: Configured and administered Linux storage using mdadm software RAID and Logical Volume Manager (LVM), supporting server storage, network file shares, and business-critical services.
- Network Infrastructure: Designed and implemented the organization’s network infrastructure, including structured cabling, wireless networks, VLAN segmentation, routing, DNS, DHCP, and secure connectivity between organizational locations.
- Firewall and VPN Administration: Deployed and administered network firewalls, including pfSense, with responsibility for firewall rules, traffic filtering, NAT, VLAN segmentation, and OpenVPN connectivity to remote offices.
- DNS Security: Enforced organization-wide DNS filtering through OpenDNS, now Cisco Umbrella, to block access to known malicious and phishing domains.
- Monitoring and Operations: Implemented infrastructure monitoring and alerting using Icinga/Nagios and SNMP, supporting proactive troubleshooting, availability management, capacity planning, and operational visibility.
- Backup and Recovery: Designed and automated cross-platform backup workflows using Bash, rsync, cron, Cygwin, SSH public-key authentication, host-key validation, restricted backup accounts, and Bacula. Tested restores to verify recoverability.
- Email Infrastructure: Deployed and administered Linux-based email services using Postfix and Dovecot with Amavisd-new, ClamAV, and SpamAssassin, along with GNU Mailman mailing lists.
- Email and DNS Security: Managed SPF, DKIM, DNS blocklists, and MX/PTR records to support email delivery and reduce spam and malicious messages.
- Cloud Services Migration: Migrated organizational email to Google Apps, mailing lists to Google Groups, and Samba-based file shares to Google Drive while preserving group-based access controls.
- Web and Business Systems: Developed and maintained a WordPress-based website and e-commerce platform supporting event promotion, online sales, and PCI-compliant payment processing.
- Infrastructure Ownership: Independently managed infrastructure priorities, system troubleshooting, upgrades, security controls, and technical documentation in a small organizational environment.
Tech Support Analyst
University of California, Santa Cruz | Santa Cruz, California | 1999–2004
- Career Progression: Advanced from Tier I to Tier II help desk support for a campus of approximately 18,000 students, faculty, and staff before moving into workstation support and server administration for approximately 300 clients.
- Departmental Support: Supported departments including Information Technology, Human Resources, Police, Physical Plant, Receiving, Business Services, and the Chancellor’s Office.
- Server Administration: Administered and maintained ten departmental servers providing database, file, print, and primary and secondary domain services supporting university administrative operations.
- Emergency Systems: Administered the campus-wide emergency alerting system integrated with telephone services for mass notification during public-safety events.
- Learning Systems: Administered and supported the university’s WebCBT online learning platform.
- Backup and Recovery: Managed server backups using the Legato NetWorker client, supporting reliable data protection and recovery.
- Enterprise Applications: Installed, configured, and supported enterprise application clients, including PeopleSoft, Banner, Business Objects, and Crystal Reports. Ensured proper database connectivity and system readiness for users and development staff.
- Training Lab Administration: Managed and maintained two Human Resources computer labs with approximately 40 workstations each, ensuring system availability for staff training.
- Operations and Support: Diagnosed and resolved network connectivity and system problems affecting availability and security. Managed support requests through a ticketed workflow while maintaining service-level expectations across multiple departments.
- User Support: Adapted technical communication and support methods to meet the needs of faculty, staff, students, administrators, and technical personnel.
Mobile Food Owner / Operator
Nixtamalized Mobile Food | Athens, Ohio | 2015–2021
- Business Operations: Founded and operated a successful mobile food business for six years, managing strategic planning, budgeting, operations, customer relations, and event logistics.
- Cloud Infrastructure: Deployed, administered, and maintained a WordPress-based website and ordering system on Amazon Web Services EC2 using a Linux, Apache, MySQL, and PHP stack.
- E-Commerce: Integrated Square payment processing to support business operations, e-commerce functionality, and online sales.
- System Administration: Maintained the underlying Linux cloud server and web application environment supporting business operations.
- Business Analytics: Analyzed customer feedback and sales data to refine product offerings and improve customer retention.
Tech Support Specialist
Ohio Department of Rehabilitation and Correction | Columbus, Ohio | 1999
- Regional Technical Support: Began on the central IT Help Desk before transitioning to regional field support.
- Multi-Site Support: Provided workstation and network support across eight facilities, including correctional institutions, a pre-release center, and the parole authority throughout Southeastern Ohio and the Columbus area.
- System Deployment: Performed system imaging, workstation deployment, hardware support, and network troubleshooting as part of a centralized government IT operation.
IT Support Technician
Tri-Star Computer Solutions | Lancaster, Ohio | 1995–1998
- Network Infrastructure: Installed and supported network infrastructure, servers, and workstations for retail, manufacturing, law-enforcement, and other public-sector clients.
- Server and Network Support: Administered and supported Novell NetWare and Windows environments for commercial and government customers.
- Network Migrations: Completed multiple ARCnet-to-Ethernet network migrations and Novell NetWare 3.x-to-4.1 migrations.
- Internet Connectivity: Integrated Windows NT Internet gateways and proxy servers into Novell NetWare networks, providing controlled shared Internet access for commercial clients.
- ISP Technical Support: Delivered outsourced telephone support for Fairfield Internet, assisting customers with dial-up connectivity, modem configuration, email clients, web browsers, and Internet-access problems.
- Desktop Support: Provided on-site, in-house, and telephone technical support for commercial and residential clients. Built, upgraded, repaired, and configured desktop computer systems.
Additional Experience
Machine Operator
Athens Mold and Machine | Athens, Ohio | 2022–2025
- Operated CNC mills and manual lathes in a precision manufacturing environment.
- Interpreted technical blueprints and followed documented procedures, quality standards, and production requirements.
- Completed precision work requiring close attention to detail, consistency, and accountability.
Education
Associate of Applied Science in Cybersecurity and Network Systems
Hocking College | Expected 2027
Technical Skills
Operating Systems: Linux · UNIX · Windows
Systems Administration and Virtualization: KVM/libvirt · LTSP · LAMP · Apache · MySQL · JBoss Application Server · Apache Tomcat · AWS EC2
Storage, Backup, and Recovery: mdadm software RAID · LVM · Linux filesystems · Network file shares · Disk provisioning · Bacula · Legato NetWorker · Backup automation · Restore testing
Identity and Access Management: OpenLDAP · Samba · Kerberos · PAM · Single Sign-On (SSO) · OAuth · Group-based access control
Networking and Firewalls: TCP/IP · VLANs · WLANs · DNS · DHCP · pfSense · OpenVPN · NAT · Firewall rule management · Network segmentation · Structured cabling · SNMP
Monitoring and Operations: Icinga · Nagios · SNMP · Infrastructure monitoring · Operational alerting · Capacity planning
Scripting and Automation: Bash · Shell scripting · cron · Python fundamentals
Email Infrastructure and Security: Postfix · Dovecot · GNU Mailman · ClamAV · SpamAssassin · Amavisd-new · SPF · DKIM · DNS blocklists · MX/PTR record configuration
Network Analysis and Security Tools: Wireshark for packet capture, traffic filtering, protocol analysis, and network troubleshooting · Nmap for host discovery, port scanning, service identification, and basic network assessment
Enterprise Applications and Services: Google Workspace administration, migration, and integration · PeopleSoft · Banner · Business Objects · Crystal Reports · WordPress
Help Desk and Ticketing: Request Tracker (RT) · GLPI · osTicket · FreeScout