Welcome to my technical portfolio. I am a systems-focused IT professional combining 10+ years of operational leadership with hands-on infrastructure engineering. Experienced in deploying virtualized Active Directory environments, self-hosting production help desks, and securing Linux mail infrastructure.
Production Services & Lab Deployments
Real infrastructure built, secured, and maintained in production and home lab environments[cite: 1].
Active Directory & AppLocker
Windows Server 2022 • QEMU/KVM • Win 11 Enterprise
Deployed Domain Controller with structured OUs, user provisioning, and kernel-level AppLocker execution policies[cite: 1].
osTicket Support Portal
Ubuntu • Nginx • MariaDB • SSL
Hardened production help desk ticketing system with Let's Encrypt SSL, custom SLA rules, and database optimization[cite: 1].
Mailcow Mail Server
Docker • Postfix • DNS Auth
Architected Docker-based Mailcow server[cite: 1]. Configured full DNS security protocols (SPF, DKIM, DMARC, rDNS)[cite: 1].
Technical Core
Systems Administration
- Windows Server 2022 & AD[cite: 1]
- Group Policy & AppLocker[cite: 1]
- Ubuntu Server Administration[cite: 1]
- QEMU / KVM Virtualization[cite: 1]
Networking & Security
- TCP/IP & IPv4 Subnetting[cite: 1]
- DNS (SPF, DKIM, DMARC, PTR)[cite: 1]
- Nginx Reverse Proxy & SSL[cite: 1]
- SSH Key Management & Firewalls
Help Desk & Web Stack
- osTicket Administration[cite: 1]
- Docker Containerization[cite: 1]
- Git / GitHub Version Control[cite: 1]
- SLA & Root-Cause Analysis[cite: 1]
Recent Milestones & Technical Notes
View all entries →Google IT Support Certificate: Technical Support Fundamentals
Completed core coursework focusing on hardware diagnostics, operating system maintenance, networking fundamentals, and customer escalation frameworks[cite: 1].
Deploying scottdiemer.com on Ubuntu & Nginx
Configured a production Next.js application served securely behind an Nginx reverse proxy with SSL termination and SSH access controls[cite: 1].
Over 10+ years managing daily operations, I served as the primary technical contact for hardware, software, and workflow deployments[cite: 1]. I built this site and my live lab subdomains to showcase my commitment to modern enterprise infrastructure, security practices, and continuous technical growth[cite: 1].