Luis A. Guerrero

Professional Summary

Project-driven System Administrator with 7+ years of experience delivering infrastructure upgrades, cloud migrations, and security initiatives across enterprise environments. Proven track record of leading end-to-end IT projects — from SD-WAN deployments and unified communications rollouts to enterprise backup implementations and multi-layered security transformations. Combines deep technical skills in Windows/Linux, Azure, and M365 with a results-oriented approach to modernizing IT operations.

Key Projects & Initiatives

SD-WAN Deployment — Cato Networks

Planned and deployed Cato Networks SD-WAN across multiple remote branches, replacing legacy VPN infrastructure with a cloud-native secure access solution
Configured site-to-site connectivity, firewall policies, and traffic routing rules to ensure stable, secure communications company-wide
Reduced network-related support tickets and improved remote branch uptime and performance

Microsoft Teams Phone System Migration

Led the full migration from legacy on-premises telephony to Microsoft Teams Phone System for the entire organization
Configured calling plans, auto-attendants, call queues, and user assignments within the M365 environment
Eliminated third-party phone service costs and unified voice communications into the existing Microsoft ecosystem

Enterprise Backup & Disaster Recovery — Druva

Implemented Druva as the enterprise backup and disaster recovery platform, protecting Microsoft Exchange, virtual machines, Azure Files, and user OneDrive data
Defined backup policies, retention schedules, and recovery point objectives (RPOs) aligned with business continuity requirements
Enabled rapid recovery capabilities to minimize downtime in the event of data loss or system failure

Microsoft Intune Implementation — iOS & Windows Device Management

Designed and deployed Microsoft Intune as the organization's MDM/MAM solution, enrolling and managing both iOS and Windows devices
Configured device compliance policies, conditional access rules, app protection policies, and automated enrollment profiles
Standardized device security across the organization through Intune's integration with Azure AD and conditional access

Technical Skills

Operating Systems	Windows Server, Linux (Ubuntu, CentOS), macOS
Networking	TCP/IP, DNS, DHCP, LAN/WAN, VPN, Firewalls, Cato Networks SD-WAN
Cloud & Identity	Microsoft Azure, Microsoft 365, Azure AD, Hyper-V, VMware, Teams Phone System
Security & Backup	ESET, Rapid7, Bitdefender, Proofpoint, Automox, Druva (Backup & DR), Microsoft Intune
Scripting & Tools	PowerShell, Bash, SQL, MySQL, SolarWinds, ServiceNow, Zoho Assist

Operating Systems

Windows Server, Linux (Ubuntu, CentOS), macOS

Networking

TCP/IP, DNS, DHCP, LAN/WAN, VPN, Firewalls, Cato Networks SD-WAN

Cloud & Identity

Microsoft Azure, Microsoft 365, Azure AD, Hyper-V, VMware, Teams Phone System

Security & Backup

ESET, Rapid7, Bitdefender, Proofpoint, Automox, Druva (Backup & DR), Microsoft Intune

Scripting & Tools

PowerShell, Bash, SQL, MySQL, SolarWinds, ServiceNow, Zoho Assist

Professional Experience

System Administrator — Roland Foods, New York, NY

March 2022 – Present

Serve as the primary System Administrator managing full IT infrastructure and cloud services for 180+ users across multiple locations
Own all key projects and initiatives — from planning and deployment through ongoing management and optimization
Provide tier 2/3 support using ServiceNow; collaborate with InfoSec and DevOps for security compliance

Desktop Support Engineer — Womankind, New York, NY

August 2021 – March 2022

Provided technical support via phone, email, and in-person; managed user accounts and permissions across Microsoft 365
Troubleshot network and endpoint issues in on-call rotations; maintained AV, DLP, and email security systems

Desktop Support Analyst — CVS Health, Woonsocket, RI

January 2017 – July 2021

Diagnosed OS, software, and hardware issues across Windows and macOS at enterprise scale for a Fortune 4 company
Documented and tracked incidents via ServiceNow; performed imaging, deployment, and diagnostics

Computer Lab Technician (Intern) — LaGuardia Community College, Long Island City, NY

April 2016 – December 2016

Assisted students with software and hardware use; maintained lab equipment, backups, and supply procurement