Björn O. - DevOps & Cloud Engineer

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Mittweida, Germany

Experience

Jul 2025 - Present

3 months

Regensburg, Germany

Remote

DevOps & Database Engineer

Omniga GmbH & Co. KG

Azure DevOps, Google GKE, Azure AKS, and workload identity federation
Creation of all cloud resources with Terraform and Ansible
Migration of Microsoft SQL Server Databases with AlwaysOn Availability Groups from Azure to Google Cloud Platform

Nov 2022 - Present

2 years 11 months

Berlin, Germany

Remote

DevOps Engineer

Bundesdruckerei GmbH

Greenfield project: 20+ OpenShift multi-cluster solution for multiple tenants and tenant cluster management
Air-gapped installation with Artifactory as source; population via GitLab pipeline and oc-mirror
Design, deployment, and maintenance of Red Hat OpenStack for OpenShift clusters
Design, deployment, and maintenance of OpenShift 4.16 clusters with OpenShift Virtualization on bare metal using Ansible
Design, deployment, and maintenance of OpenShift 4.16 clusters on Proxmox with Ansible and Argo CD (OpenShift GitOps)
Design, deployment, and maintenance of OpenShift Data Foundation in external mode with a separate Ceph cluster
Design, deployment, and maintenance of OpenShift Data Foundation with internal disks and HashiCorp Vault as KMS
Design, deployment, and maintenance of Cert Manager with HashiCorp Vault as issuer
Configuration of Vault Secret Operator for Kubernetes secrets
Design, deployment, and maintenance of secret management with HashiCorp Vault Enterprise
Configuration of LDAP as authentication provider for OpenShift
Support and improvement of linting and test pipelines for Ansible playbook and role GitLab repositories
Design, deployment, and maintenance of Ansible Automation Platform in the management OpenShift cluster for tenant cluster management
Configuration of OpenShift AI and NVIDIA GPU Operator
Provisioning, management, and optimization of OpenShift resources under virtual network infrastructure
Implementation of Zero Trust networks with Red Hat OpenShift 4
Design, deployment, and maintenance of observability with Grafana Enterprise and Prometheus
Design, deployment, and maintenance of a DDI solution with BlueCat

Nov 2022 - Mar 2025

2 years 5 months

Frankfurt, Germany

Remote

DevOps Engineer

Deutsche Bahn AG

Configuration of Red Hat Enterprise Linux servers 8 & 9 with Ansible (Postfix, Nginx, SSSD)
Ansible role for issuing and deploying certificates from a Windows Server CA and an AWS PCA

Jun 2022 - Jul 2023

1 year 2 months

IT Team Lead

IMM electronics GmbH

Responsible for the IT of the entire company
Project responsibility for the ERP system (proAlpha) and related processes
Administration, updating, and maintenance of the entire IT infrastructure
Planning cloud migrations to Office 365 and other applications in Azure
Preparation for ISO 27001 audit
Implementation of a monitoring system based on CheckMK and replacement of the previous Nagios system

Mar 2016 - May 2022

6 years 3 months

Head of IT System Administration, Head of Kubernetes and DevOps, and Team Lead Microsoft Services & Support

ASPICON GmbH

Planning and implementation of Kubernetes, OpenShift, and Rancher projects for clients
Development and rollout of automation solutions based on Ansible
Configuration of application and user security with LDAP, SAML2, and OIDC
Maintenance and enhancement of monitoring checks for Kubernetes and SQL Server in CheckMK
Leadership of the Microsoft and Kubernetes team for client projects (3–4 employees)
Leadership of system administrators for internal systems (2 employees)
Establishment of revenue-relevant consulting and service department for SQL Server services, processes, and structures
Restructuring and optimization of the internal IT department with ITIL®-aligned processes
Support of management in preparation for ISO 27001 certification
Project responsibility for the introduction of a comprehensive DevOps and configuration management tool based on Puppet
Project responsibility for the implementation of an ITSM tool and ITIL®-oriented processes
Migration of Zimbra environment to Microsoft Exchange Server 2016
Project responsibility for deployment of a VDI environment based on VMware Horizon with Windows and Linux clients
Responsibility and execution of infrastructure projects for clients (VMware vSphere 6.5, Veeam, Microsoft Server)
Responsibility and execution of Microsoft SQL Server projects for clients (health checks, performance analyses, Always On Availability Group clusters)

Feb 2013 - Feb 2016

3 years 1 month

Mittweida, Germany

Head of System Administration

IMM Holding GmbH

Led system administration in a two-person team
Responsible for the entire Ricoh printing system
Introduced, installed, and configured a Nagios-based server monitoring system
Project lead for implementing a ticketing system
Managed VMware vSphere 5 environment, Dell servers and storage, Nexenta storage, Windows Server 2012
Created various IT infrastructure documentation
Participated in projects integrating new sites in Mittweida

Aug 2009 - Jan 2013

3 years 6 months

Senior System Administrator

Omniga GmbH & Co. KG

Department head of IT administration with budget responsibility
Technical lead for 4 full-time administrators and 2 apprentices
Responsible for training apprentices in system integration
Significantly involved in recruiting IT administrators and apprentices
Overall IT infrastructure planning and project lead for new product infrastructure
Implemented and consolidated ITIL®-compliant processes (incident, problem, change management)
Planned and executed migration to virtual environments
Member of the internal talent management program
Responsible for various IT security projects (IDS, penetration tests, vulnerability scans, defense in depth)
Managed online products in colocation data centers: NetApp storage, VMware ESX, KEMP load balancers, Debian Linux, KVM, MSSQL 2008 R2 high availability, ASP.NET on an IIS web farm
Internal IT management: SharePoint Server 2010 installation, configuration, and maintenance; IT asset management; implemented OTRS ticketing system