Hi, I'm Justin.

Building Reliable
IT Infrastructure.

I'm an IT Support Technician in a Managed Service Provider environment, keeping Microsoft 365, Windows, and endpoint security running for business clients day to day.

Off the clock, I run a self-built Proxmox lab — Linux, Docker, networking, PowerShell — to learn by breaking things before I have to fix them for real.

View Resume View Projects

About Me

I'm an IT Support Technician working in a Managed Service Provider (MSP) environment, where I help business clients troubleshoot Windows systems, administer Microsoft 365 environments, manage user identities, and support endpoint security and networking. Every day brings a different challenge, which is one of the things I enjoy most about IT.

Outside of work, I spend much of my time building and improving my home lab. It's where I experiment with virtualization, Linux, Docker, networking, and infrastructure technologies before applying what I learn in real-world environments. Building systems from the ground up has become my favorite way to learn and continually improve my skills.

I care about well-documented infrastructure and automating repetitive tasks wherever I can. I'm working toward a Systems Administrator or Infrastructure Engineer role, with a focus on Microsoft 365, virtualization, networking, and cloud technologies.

Professional Experience

  • Microsoft 365 Administration
  • Exchange Online
  • Entra ID
  • Active Directory
  • NinjaOne RMM
  • SentinelOne
  • Guardz
  • Barracuda
  • Huntress
  • SonicWall Firewalls

Home Lab & Learning

  • Proxmox VE
  • Docker & Docker Compose
  • Ubuntu Server
  • Linux Administration
  • PowerShell Scripting
  • Networking & VLANs
  • Nginx Proxy Manager
  • Jellyfin Media Server
  • Homepage Dashboard

Experience

Present

IT Support Technician

Managed Service Provider (MSP)

I provide day-to-day technical support for business clients across a variety of industries, helping maintain secure, reliable, and productive IT environments. My role combines troubleshooting, administration, customer service, and continuous learning while supporting Microsoft 365, Windows, networking, and endpoint security.

  • Administer Microsoft 365, Exchange Online, and Entra ID environments.
  • Manage user onboarding, offboarding, licensing, MFA, and password resets.
  • Troubleshoot Windows desktops, printers, hardware, networking, and application issues.
  • Support Active Directory administration and user account management.
  • Deploy, monitor, and troubleshoot endpoint security solutions.
  • Built and maintain a PowerShell toolkit (~20 scripts) for network discovery, system health checks, and security auditing.
  • Provide remote support using NinjaOne and other remote management tools.
  • Document procedures and assist with improving internal support workflows.
Microsoft 365Exchange OnlineEntra IDActive DirectoryPowerShellNinjaOneSentinelOneGuardzBarracudaHuntressSonicWall
Ongoing

Home Lab & Continuous Learning

Personal Infrastructure Project

My home lab serves as a practical learning environment where I build, break, troubleshoot, and document enterprise-inspired infrastructure. It allows me to gain hands-on experience with technologies beyond my daily responsibilities and continually strengthen my systems administration skills.

  • Deploy and maintain a Proxmox virtualization environment.
  • Host Docker containers for self-hosted infrastructure and services.
  • Configure Linux servers, storage, permissions, and networking.
  • Experiment with VLANs, routing, DNS, and virtualization concepts.
  • Implement monitoring, dashboards, reverse proxies, and media services.
  • Document deployments and maintain a GitHub repository for projects.
  • Practice troubleshooting by intentionally testing and recovering from failures.
  • Continuously expand knowledge through hands-on experimentation.
Proxmox VEDockerUbuntu ServerLinuxNetworkingVLANsNginx Proxy ManagerPowerShellGitGitHub

Featured Projects

Projects that demonstrate my hands-on experience with virtualization, Microsoft 365 administration, Linux, Docker, and enterprise infrastructure.

Infrastructure

Proxmox Home Lab

→

Built and maintain a Proxmox virtualization environment to gain hands-on experience with enterprise infrastructure, virtualization, Linux administration, storage, networking, and self-hosted services. This environment serves as the foundation for all of my home lab projects.

  • Virtual Machines & LXC Containers
  • Shared SMB Storage
  • Docker Integration
  • Snapshots & Backups
  • Linux Administration
Proxmox VEDockerUbuntuLinuxNetworking
View Project →

Self Hosting

Docker Services

→

Designed and deployed multiple Docker services for home security camera streaming, service discovery, and reverse proxy management, managed through Portainer while learning containerized application deployment.

  • Homepage Dashboard
  • go2rtc (Camera Streaming)
  • Nginx Proxy Manager
  • Portainer
DockerDocker ComposeLinuxReverse Proxy
View Project →

Administration

Microsoft 365 Administration

→

Provide daily administration and support for Microsoft 365 environments in a Managed Service Provider (MSP) setting, helping business clients manage identities, licensing, Exchange Online, and security.

  • Exchange Online
  • Entra ID
  • Microsoft 365 Licensing
  • Multi-Factor Authentication
  • User Provisioning
Microsoft 365ExchangeEntra IDPowerShell
View Project →

Networking

Networking Lab

→

Hands-on networking practice covering VLANs, managed switches, routing, DNS, and firewall configuration using enterprise-style networking equipment, built to strengthen the foundational networking skills used daily in MSP work.

  • VLAN Segmentation
  • Managed Switch Configuration
  • DNS & DHCP
  • Firewall Rules
  • Routing
NetworkingVLANsDNSDHCPSonicWall
View Project →

Automation

PowerShell Automation

→

A growing toolkit of PowerShell scripts for network discovery, system troubleshooting, and everyday IT administration, built to automate repetitive tasks and standardize how I diagnose issues across client environments.

  • Async Network Scanner
  • Multi-Threaded Runspaces
  • System Health Diagnostics
  • Security & User Auditing
  • CSV Export & Reporting
PowerShellAutomationNetworkingWindows
View Project →

Skills & Technologies

My technical experience comes from supporting business clients in a Managed Service Provider (MSP) environment while continuously expanding my knowledge through hands-on home lab projects and self-hosted infrastructure.

Microsoft 365 & Identity

Daily administration of Microsoft 365 environments while supporting business clients in a Managed Service Provider (MSP) environment.

Microsoft 365Exchange OnlineEntra IDIntuneAzure FundamentalsMFAUser Management

Windows & Active Directory

Supporting Windows workstations and servers, managing users, permissions, and core infrastructure services.

Windows 11Windows ServerActive DirectoryGroup PolicyDNSDHCP

Virtualization

Building and maintaining a Proxmox home lab to gain experience with enterprise virtualization and infrastructure.

Proxmox VEVirtual MachinesLXC ContainersSnapshotsStorageBackups

Linux & Docker

Deploying and maintaining self-hosted services using Docker while improving Linux administration skills.

Ubuntu ServerDockerDocker ComposeLinux CLINginx Proxy ManagerJellyfin

Networking

Building and troubleshooting small business and home lab networks while learning enterprise networking concepts.

TCP/IPVLANsDNSDHCPVPNSonicWall

Security

Supporting endpoint protection, identity security, and email security platforms used by business clients.

SentinelOneHuntressGuardzBarracudaEndpoint Protection

Automation & Development

Writing scripts and using version control to automate repetitive tasks and document infrastructure projects.

PowerShellGitGitHubVS CodeScripting

IT Operations

Providing technical support, documentation, remote troubleshooting, and endpoint management in an MSP environment.

NinjaOneRemote SupportHardware TroubleshootingSoftware DeploymentDocumentationCustomer Support

Let's Connect

Whether you're interested in my work, have an IT opportunity, or simply want to connect, I'd love to hear from you.

Interested in working together?

I'm always interested in connecting with other IT professionals, collaborating on projects, and exploring new career opportunities.

Emailjhoffmann3987@yahoo.com
GitHubgithub.com/jhoffmann3987
LocationPensacola, Florida
View ResumeDownload ResumeView GitHub