System administrator for Linux and Windows environments. Automation of complex IT processes with Ansible and Puppet, management of server infrastructures such as virtualizations, web servers, firewalls, proxies, etc. Full-stack web developer with HTML, S/CSS, JavaScript, TypeScript, PHP and Python, MariaDB and PostgreSQL; including API solutions.
My professional career in IT administration and software development spans over two decades of hands-on experience. Here you will find a chronological overview of my professional positions and qualifications.
03.2025 – present
As an external specialist, I support clients with the automation of their Linux infrastructures. My focus is on developing tailored automation solutions and scripts with various languages and tools that automate repetitive processes and make system administration more efficient. Depending on requirements, I also manage Windows environments and take on tasks in adjacent areas such as networking or security. When needed, I share knowledge with team members to build sustainable competencies within the teams. The individual projects and references can be found in the project overview.
The various projects and references can be found in the project overview.
01.2024 – 07.2025
03.2025 – 07.2025
After my official departure from CSD (Strehlow), I completed various tasks and projects as a side job. In particular, I continued managing the Linux administration and created and expanded documentation. To ensure that the Windows deployment via the WDS/MDT server continued to function smoothly, I trained and further supported a colleague.
01.2024 – 02.2025
At CSD Holding (Strehlow), I essentially served as a bridge between the IT service (helpdesk) and the system administrators, as well as a DevOps engineer for the development department (PIM). My main responsibilities included general 2nd-level support for Windows Server, Active Directory and Exchange Server, as well as assisting the IT service with 1st-level support. Additionally, I managed the Linux infrastructure consisting of servers (Debian/Ubuntu, RHEL) and Docker containers (Portainer). For repetitive processes, I implemented an Ansible environment with Semaphore UI and the already existing GitLab server. Here I created a collection for Linux maintenance processes and one for coordinated app recycling of Microsoft IIS. Furthermore, I was responsible for Windows deployment (WDS/MDT) and the automation of tasks via PowerShell. After my official departure at the end of February 2025, I continued supporting the company as a Linux system administrator on a part-time basis (remote) to complete outstanding work and projects.
05.2019 – 12.2023
At LOOMA, I was significantly involved in the transformation from a traditional IT service company to a modern Managed Service Provider (MSP). My focus was on migrating and adapting client systems to the new MSP models, transitioning existing infrastructures completely or in a hybrid manner to modern cloud environments. A core task was the migration from on-premises Exchange servers to Microsoft 365. The transformation also included building a Linux infrastructure (Debian/Ubuntu) with open-source solutions such as Proxmox VE and OPNsense. As a monitoring solution, we implemented Zabbix including proxy structures in our data centers and at our clients' sites. Additionally, I was responsible for our clients' Xibo servers and supported them with campaigns and technical questions.
05.2014 – 04.2019
At team logistik GmbH, I was the sole administrator responsible for the Haldensleben branch and additionally supported the headquarters' IT. In addition to 1st-level support for all computer workstations, mobile phones and digital truck systems (digital tachograph and telematics system), I administered the local Windows Server infrastructure including Exchange Server and managed the Securepoint firewalls. I also assisted in setting up and aligning new branches with the existing company structures in terms of IT. And because everyone pitches in during harvest season and I hold a truck driver's license, I also served as a truck driver and dispatcher on the side.
07.2002 – 04.2014
After my internship, I was hired directly and worked over 10 years for the IT service company in Berlin. There, I worked in 2nd/3rd-level support for Windows environments and printer systems, for various companies and public institutions. Additionally, we carried out IT relocations for various federal agencies and institutions to Berlin. A large part of my work consisted of supporting the Berlin City Sanitation Services (BSR), where I was deployed on-site as a system technician. There, I administered the IBM POS cash register systems at the recycling centers and in the canteens, as well as the industrial computer systems at the Ruhleben waste-to-energy plant. My responsibilities included managing the IPC systems for scales, conveyor systems and recycling systems.
07.2000 – 06.2002
After military service, I reoriented professionally and began training as an IT specialist. The focus was on Windows Server environments and Novell NetWare, the latter already being in decline. In addition to networking technologies, I learned the general fundamentals of computer science and programming, which laid the foundation for my further IT career. I completed my internship at Systemhaus Datentechnik Berlin GmbH, where I was able to gain my first practical experience in a professional IT environment.
07.1999 – 06.2000
After my apprenticeship, I directly completed my military service at Panzerlehrbataillon 334 "CELLE" and Panzerpionierlehrkompanie 90. During this time, I decided to extend my service to 12 months and transfer to the enlisted ranks. During service, I was deployed as a machine gunner on the Transportpanzer Fuchs armored personnel carrier. The duties of the training units included supporting the Panzertruppenschule Munster in various combat exercises and training programs.
08.1996 – 06.1999
My first career choice led me into a carpentry apprenticeship, where I learned both the traditional and modern craft. Originally attracted by the manual and artistic aspects of this trade, my interest quickly shifted toward machines and equipment. During the apprenticeship, I was trained on the newly acquired woodworking machines and machining centers and subsequently participated in CNC programming and setup. During this time, I gained my first experience in computer technology and programming.