Erin Fernando

IT Administrator
Tucson, AZ  ·   ·  LinkedIn

About

Small business IT admin for ten years. In charge of requisitions, cabling, network topology, firewall security, email security, budgeting, troubleshooting, tech support, PCI DSS compliance, website, antivirus, incident response, employee training, backups, maintenance, hardware repair, and house calls.

Certifications

CompTIA Security+ Certified badge
CompTIA Security+
Earned May 2026

Technical Skills

Operating Systems

Windows 10, Windows 11, Windows Server 2022

Networking

TCP/IP, DNS, DHCP, VPN (NordLayer), firewall configuration, network segmentation, VLANs, Wi-Fi site surveys, wireless bridging (Ubiquiti airMAX), cable management

Security

CompTIA Security+, PCI DSS (SAQ B-IP) compliance, email authentication (SPF, DKIM, DMARC), endpoint protection (Avast Small Office), antivirus management, access control, password policies, phishing awareness training, backup and disaster recovery, incident response

Systems & Cloud

Microsoft 365 administration, OneDrive, Active Directory (AD), Group Policy (GPO), Hyper-V, domain and tenant migrations

Hardware

20+ years building PCs — component selection, diagnostics, hardware-level troubleshooting, hardware configuration

Support

Technical support, remote support, end-user training, documentation, error reporting, vendor management, subscription and license auditing

Web

HTML, CSS, small business website design

Experience

IT Administrator + Web Admin 2016 – Present
Oasis at Wild Horse Ranch  ·  Contract: Project-based + On-Call  ·  Tucson, AZ

Sole IT admin for a full-service event venue.

  • Audited the existing security posture on arrival — rotated compromised credentials, enforced unique secure passwords, secured POS hardware access, and ran phishing awareness training for staff.
  • Researched hardware requirements and purchased a stateful firewall and managed switch. Designed and segmented the network to isolate POS traffic using VLANs and limiting cross-chatter with ACL rules. Configured firewall exceptions and passed third-party audits for PCI DSS compliance. Added personal VPN and antivirus on all endpoints.
  • Conducted wireless surveys to detect the range of the router and any frequency conflicts, then upgraded to a higher output model for handheld payment processing during events.
  • Implemented OneDrive for regular operational backups, and an airgapped encrypted drive for ransomware protection.
  • Removed duplicate subscriptions, introduced new technologies as cost-saving measures, delivered price comparison reports and made recommendations to executive management. Migrated Microsoft 365 licenses, OneDrive, Outlook, website files, email services, and domain services between providers three times.
  • Diagnosed recurring email deliverability issues — traced them to shared IP blocklisting from a bad hosting neighbor, migrated to a new provider to permanently fix reputation. Configured email authentication (SPF, DKIM, DMARC) to prevent spoofing and improve deliverability.
  • Modernized their website and established web analytics for SEO purposes.
  • Salvaged parts from two defective PCs for a new office unit that ran for 10 more years. RIP 2026.
Earlier Roles (2012 – 2016)

Married to an active-duty Navy servicemember during this period — short tenures reflect military relocations.

Library Page

July 2012 – Oct. 2014
Geasa-Marana Public Library

Troubleshot public computers and printers, taught one-on-one computer classes to patrons, and handled front-desk customer service. First role where I explained technical concepts to non-technical users on a daily basis.

Sales Associate (Seasonal)

Oct. 2014 – Jan. 2015
Best Buy

Sold consumer tech during the holiday season. Leaned on years of PC-building knowledge to help customers pick the right hardware.

Crew Member

Jan. 2016 – Oct. 2016
Dunkin’ Donuts

Fast-paced customer service — point-of-sale (POS) operations, cash handling, sales floor. Transitioned to the IT admin contract at Oasis at Wild Horse Ranch after this role.

Projects

Desert Bloom Estates logo and building against a night sky

Event Venue Website & RSVP System

Built a full website for a garden estate wedding venue with an interactive event planner and guest RSVP system. Stood up a MySQL database for response tracking, configured CORS and rate limiting, and placed database credentials outside the web root. Deployed to shared PHP hosting via SSH with key-based authentication.

Windows Server and Active Directory (AD) Lab

Spun up a home lab for structured learning exercises. Windows Server 2022 was used as the base domain controller, then joined to three new Windows 11 VMs as users. Added an assortment of GPOs ranging from password hardening measures, to a standardized background image, and mapped a network drive then implemented a RBAC to enforce privileged access.

Custom Server Build

Selected and sourced all components for a custom-built server with no vendor documentation available. Assembled the hardware from parts and automated portions of the OS installation and configuration. Set up code linting and error reporting pipelines.

Education

Marana High School Diploma, May 2012

Honor Roll. Coursework in Computer Programming.

Contact

Email
Location Tucson, AZ
Download Resume (PDF)
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