Recommended expert

Björn Ohlrich

IT Freelancer

Björn Ohlrich
Mittweida, Germany

Experience

Nov 2022 - Present
3 years 3 months

IT Freelancer

Self-employed

  • Projects in Azure and Google Cloud
  • Azure DevOps
  • Google GKE and Azure AKS
  • Workload Identity Federation
  • Creation of all resources with Terraform and Ansible
  • Available for projects in DevOps, Kubernetes, Rancher and OpenShift
  • High-availability database solutions with Microsoft SQL Server
Nov 2022 - Oct 2025
3 years

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, fill via GitLab pipeline and oc-mirror
  • Design, setup and maintenance of Red Hat OpenStack for running OpenShift clusters
  • Design, setup and maintenance of OpenShift 4.16 clusters with OpenShift Virtualization on bare metal using Ansible
  • Design, setup and maintenance of OpenShift 4.16 clusters on Proxmox with Ansible and ArgoCD (OpenShift GitOps)
  • Design, setup and maintenance of OpenShift Data Foundation in external mode with a separate Ceph cluster
  • Design, setup and maintenance of OpenShift Data Foundation with internal disks and encryption using HashiCorp Vault as KMS
  • Design, setup and maintenance of Cert Manager with HashiCorp Vault as issuer
  • Configuration of Vault Secret Operator for Kubernetes secrets
  • Design, setup and maintenance of secret management with HashiCorp Vault Enterprise
  • Configuration of LDAP as auth provider for OpenShift
  • Support and improvement of linting and test pipelines for Ansible playbook and role GitLab repositories
  • Design, setup and maintenance of the Ansible Automation Platform in the management OpenShift cluster for tenant cluster management
  • Configuration of OpenShift AI and NVIDIA GPU Operator
  • Creation, management and optimization of OpenShift resources under virtual network infrastructure
  • Implementation of zero-trust networks with Red Hat OpenShift 4
  • Design, setup and maintenance of observability with Grafana Enterprise and Prometheus
  • Design, setup and maintenance of a DDI solution with BlueCat
Nov 2022 - Mar 2025
2 years 5 months

DevOps Engineer

DB InfraGo 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 company-wide IT
  • Project responsibility for the ERP system (proAlpha) and related processes
  • Management, update and maintenance of the entire IT infrastructure
  • Planning of cloud migrations to Office 365 and other applications in Azure Cloud
  • Preparation for ISO 27001 audit
  • Introduction of a monitoring system based on CheckMK and migration from Nagios
Mar 2016 - May 2022
6 years 3 months

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

ASPICON GmbH

  • Planning and implementation of Kubernetes, OpenShift and Rancher projects at customer sites
  • 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
  • Lead Microsoft and Kubernetes teams for customer projects (3–4 employees)
  • Lead system administrators for internal systems (2 employees)
  • Establishment of revenue-relevant consulting and service department for SQL Server services, including processes and structures
  • Revamp and optimization of internal IT department with ITIL-aligned processes
  • Support of management in preparation for ISO 27001 certification
  • Project responsibility for introduction of a comprehensive DevOps and configuration management tool based on Puppet
  • Project responsibility for introduction of an ITSM tool and related IT processes aligned to ITIL standard
  • Migration of Zimbra environment to Microsoft Exchange Server 2016
  • Project responsibility for introduction of a VDI environment based on VMware Horizon with Windows and Linux clients (RHEL)
  • Implementation of infrastructure projects at customers (VMware vSphere 6.5, Veeam, Microsoft Server environments)
  • Implementation of Microsoft SQL Server projects at customers (health checks, performance analysis, setup of AlwaysOn 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 printing system (Ricoh)
  • Implemented, installed, and configured a server monitoring system (Nagios)
  • Led the project to introduce a ticket system
  • Administered systems: VMware vSphere 5 environment, Dell servers and storage, Nexenta storage, Windows Server 2012
  • Created documentation for the IT infrastructure
  • Participated in projects to connect 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 leadership of 4 full-time administrators and 2 apprentices
  • Responsible for training apprentices in specialist IT system integration
  • Strong involvement in recruitment of IT administrators and apprentices for system integration
  • General IT infrastructure planning and project responsibility for infrastructure of new products
  • Introduction and consolidation of ITIL-compliant processes (incident, problem and change management)
  • Planning and implementation of migration to virtual environments
  • Member of internal talent management program
  • Responsibility for various IT security projects (IDS, penetration tests, vulnerability scanning, defense in depth)
  • Management of online products in collocations (external data centers): planning and operation of high-availability online products, NetApp storage systems, VMware ESX, KEMP load balancer, Debian Linux, KVM, MSSQL 2008R2 high availability, ASP.NET in IIS web farm
  • Management of internal IT: MS SharePoint Server 2010 installation, configuration, maintenance, IT asset management, introduction of OTRS ticket system
Apr 2007 - Aug 2009
2 years 5 months
Regensburg, Germany

Manager System Administration

Smilingbits GmbH & Co. KG

  • Responsible for training apprentices in specialist IT system integration
  • Management of online products in co-locations (external data centers)
Jul 2005 - Feb 2007
1 year 8 months

IT Administrator

Bundeswehr

  • IT administrator of 3./FjgBtl 451
Apr 2005 - Jun 2005
3 months

Basic military service

Bundeswehr

Aug 2004 - Mar 2005
8 months

Technician at the University Computing Center

Chemnitz University of Technology

Languages

German
Native
English
Advanced

Education

Aug 2001 - Jul 2004

Chemnitz University of Technology

Vocational training and diploma as IT Specialist in System Integration · IT Specialist in System Integration · Chemnitz, Germany

Sep 1995 - Jul 2001

Bernhard-Schmidt-Schule

Secondary School Certificate · Mittweida, Germany

Sep 1991 - Jul 1995

Primary School

Mittweida, Germany

Certifications & licenses

Red Hat Certified Engineer

Red Hat Certified System Administrator

Certified Kubernetes Administrator

Microsoft Certified Solutions Associate

Microsoft Certified Solutions Expert

Microsoft Certified Solutions Associate

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