Hello, I'm

Marcel Grieskamp

IT Enthusiast

System Administrator at Ernstings family

I keep networks, servers and point of sale systems running smoothly — with a hands-on approach to system administration, support and infrastructure.

Get in touch View skills

Portrait photo of Marcel Grieskamp

What I work with

Skills

DHCP
DNS
Firewall
pfsense
Routing
Subnetting
Switching
VLAN
VPN
WLAN Management

Active Directory
Container
Debian / Windows Server
E-Mail Server
Linux / Windows / macOS
Mobile Device Management
Privileged Access Management
Scripting (PowerShell, Bash)
Virtualization (Hyper-V, Proxmox)

Asset Management
Card Terminals
MDE Devices
PCI-DSS
POS Hardware Support

First-Level Support
Hardware
On-Site Support
Problem Management
Remote Support
Second-Level Support
Ticket Systems (OTRS, Matrix42)
Troubleshooting

Career so far

Experience

October 2025 – Present

System Administrator - IT Store Frontend

Ernsting's family

August 2022 – June 2025

Apprenticeship: IT Specialist for System Integration

Universität Münster

Off the clock

Hobbies

Photography

Capturing moments and landscapes

System Administration

Managing servers and infrastructure

Gym & Cycling

Strength training, fitness and cycling