Michael Freitag - IT Systems Administrator

Q: Where is Michael based?

Michael is based in La Massana, Andorra and can operate in on-site , hybrid , and remote work models.

Q: What languages does Michael speak?

Michael speaks the following languages: German (Native), English (Advanced), Spanish (Elementary) .

Q: How many years of experience does Michael have?

Michael has at least 18 years of experience. During this time, Michael has worked in at least 8 different roles and for 10 different companies . The average length of individual experience is 1 year and 5 months . Note that Michael may not have shared all experience and actually has more experience.

Q: What is Michael's latest experience?

Michael's most recent position is Linux Specialist at Evex-Group GmbH .

Q: What companies has Michael worked for in recent years?

In recent years, Michael has worked for Evex-Group GmbH , Hitachi Rail GTS Deutschland GmbH , ING DiBa AG , SAP AG , and Deutsche Flugsicherung .

Q: Which industries is Michael most experienced in?

Michael is most experienced in industries like Information Technology , Aerospace and Defense , and Banking and Finance . Michael also has some experience in Manufacturing and Transportation .

Q: Which business areas is Michael most experienced in?

Michael is most experienced in business areas like Information Technology , Operations , and Project Management . Michael also has some experience in Business Intelligence .

Q: Which industries has Michael worked in recently?

Michael has recently worked in industries like Aerospace and Defense , Information Technology , and Banking and Finance .

Q: Which business areas has Michael worked in recently?

Michael has recently worked in business areas like Information Technology , Project Management , and Operations .

Recommended expert

La Massana, Andorra

Check rate

Experience

Oct 2025 - Mar 2026

6 months

Linux Specialist

Evex-Group GmbH

Updated production Proxmox server from Debian 10 to 12
Adapted Ansible playbooks to the environment after the update
Clustered Proxmox servers
Migrated VMware to Proxmox
Resolved customer issues with MySQL servers
Implemented a backup solution including Mariabackup
Updated Zabbix monitoring

Oct 2024 - Dec 2025

1 year 3 months

Linux Specialist

Hitachi Rail GTS Deutschland GmbH

Developed and implemented a repository mirror for the main Linux distribution package repositories
Integrated CheckMK monitoring

Jul 2023 - Apr 2025

1 year 10 months

Subproject Lead

ING DiBa AG

IT project management
Tracked the migration and relocation of DevOps security-critical infrastructures
Assessed bandwidth requirements for network connections
Coordinated leased line suppliers
Automated OS deployments (PXE, Kickstart, Ansible)
Coordinated overall project, stakeholders, and departments
Coordinated and managed the Cisco supplier
Defined, tracked, and reported milestones
Integrated bare-metal servers into cloud architectures

Jan 2022 - Jun 2023

1 year 6 months

Linux Specialist

SAP AG

Provided an iPXE server
Integrated bare-metal servers like HP Superdome Flex into AWS cloud
Handed over to SAP deployment (Ansible)

Aug 2020 - Sep 2024

4 years 2 months

Linux Specialist

Deutsche Flugsicherung

Developed a new Linux distribution for automated data center installation and configuration from ISO or PXE install server
Implemented automated deployment of third-party virtual machines via KVM on a data center server
Adapted automation to changes in RHEL
System hardening
Updated packages for new dependencies

May 2017 - Mar 2018

11 months

Linux Specialist Engineer

noris network AG

Designing and implementing customer solutions
Implementing security policies
Troubleshooting on internal and customer servers

Jan 2014 - Dec 2020

7 years

Linux Specialist

SAP AG

Provisioning an iPXE server
Integrating bare-metal servers like HP Superdome Flex into AWS Cloud
Handover to SAP Deployment (Ansible)

Jan 2014 - Dec 2020

7 years

Project Lead

Thales Deutschland AG

Virtualization with KVM, VMware ESXi, Docker
Implementing RAS access without a security level and for VS-NfD
Rebuilding and hardening the DMZ, connecting consortium partners
Project planning (WBS, time and capacity management, risk management)
Stakeholder management and reporting
Defining and tracking milestones

Mar 2011 - Jul 2011

5 months

Second Level Support

Deutsche Post AG

Implementing scripts to provide statistics and accounting data to replace manual collection
Administering RHEL servers
Administering Postfix with custom application
Administering VPN connections according to BSI standards
Automating workflows with shell/Perl scripts
Implementing security policies
DevOps rollout with Subversion/Puppet

Jan 2010 - Feb 2011

1 year 2 months

Unix Operations

Commerzbank AG

Enhancing a web reporting tool to visualize the current project status
Deputy team lead
Administering Solaris E10k cluster
Datacenter operations
Coordinating business units

Feb 2001 - Aug 2001

7 months

Unix Operating

Commerzbank AG

Further development of a web reporting tool to visualize the current project status
Deputy team lead
Administration of Solaris E10k cluster
Data center operations
Coordination of departments

Oct 1999 - Jan 2001

1 year 4 months

Linux Instructor

QPunkt GmbH

Instructor for training IT specialists in UNIX/Linux, networks, HTML, and PHP
Giving freelance presentations
Preparing teaching materials

Jan 1997 - Jan 2001

4 years 1 month

Linux Specialist Engineer

noris network AG

Designing and implementing customer solutions
Implementing security policies
Troubleshooting on internal and client servers

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Aerospace and Defense, Banking and Finance, Manufacturing, and Transportation.

Information Technology

Aerospace and Defense

Banking and Finance

Manufacturing

Transportation

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Operations, Project Management, and Business Intelligence.

Information Technology

Operations

Project Management

Business Intelligence

Summary

I have built a solid career in IT, with a main focus on Linux systems administration and network security. I have managed the migration, update and clustering of servers, implemented automation using Ansible and provided robust solutions for backup, virtualization and cloud integrations. I actively tackle challenges from software updates to infrastructure hardening and system deployment.

I combine hands-on technical expertise with years of project and team coordination experience. I believe in creating secure, efficient and scalable IT systems that meet demanding operational requirements. My practical approach and continuous learning help me deliver reliable, up-to-date solutions in dynamic and high-pressure environments.

Skills

It Project Management, Architecture And Implementation Of Security-Critical Infrastructures
Automated Operating System Deployments (Pxe, Kickstart, Ansible)
Integration Of Bare-Metal Servers Into Cloud Architectures
Virtualization With Kvm, Vmware Esxi, Docker
System Hardening According To Bsi Standards
Stakeholder Management, Milestone Tracking And Reporting
Linux/Unix Operating Systems: Rhel, Centos, Fedora, Alma, Debian, Ubuntu, Solaris, Hp-Ux
Virtualization: Vmware Esxi, Kvm, Docker (Lxc)
Automation & Configuration Management: Ansible, Puppet, Kickstart, Ipxe
Devops & Ci/Cd Tools: Git, Gitlab, Svn, Jenkins
Databases: Postgresql, Mysql/Mariadb, Openldap / Slapd
Programming & Scripting: Bash, Python, Php, Sql, C
Network Services & Infrastructure: Apache, Postfix, Dovecot, Dns, Dhcp, Vpn
Project Management Tools: Jira, Confluence, Servicenow, Sharepoint, Otrs

Languages

German

Native

English

Advanced

Spanish

Elementary

Education

Oct 1994 - Jun 1999

Friedrich-Alexander University Erlangen

Computer Science · Erlangen, Germany

Oct 1991 - Jun 1993

Berufsoberschule Nürnberg

Subject-specific High School Diploma · Computer Science / Technology Track · Nuremberg, Germany

Oct 1991 - Jun 1992

Vorklasse FOS Fürth

General · Fürth, Germany

...and 4 more

Certifications & licenses

IT Systems Administrator

Personal Certification Body gps-cert

Statistics

Experience

Total positions 13

Experience in Information Technology 13 y

Avg length 2 y 4 m

Longest experience 6 y 11 m

Expertise

Recent roles Linux Specialist, Subproject Lead, Linux Specialist Engineer

Main industries Information Technology, Aerospace and Defense, Banking and Finance

Main business areas Information Technology, Operations, Project Management

Qualifications

Highest degree Doctorate

Certifications earned 1

Profile

Created

January 2026

Last Update

June 2026

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Frequently asked questions

Have questions? Find more information here.

Where is Michael based?

Michael is based in La Massana, Andorra and can operate in on-site, hybrid, and remote work models.

What languages does Michael speak?

Michael speaks the following languages: German (Native), English (Advanced), Spanish (Elementary).

How many years of experience does Michael have?

Michael has at least 18 years of experience. During this time, Michael has worked in at least 8 different roles and for 10 different companies. The average length of individual experience is 1 year and 5 months. Note that Michael may not have shared all experience and actually has more experience.

What roles would Michael be best suited for?

Based on recent experience, Michael would be well-suited for roles such as: Linux Specialist, Subproject Lead, Linux Specialist Engineer.

What is Michael's latest experience?

Michael's most recent position is Linux Specialist at Evex-Group GmbH.

What companies has Michael worked for in recent years?

In recent years, Michael has worked for Evex-Group GmbH, Hitachi Rail GTS Deutschland GmbH, ING DiBa AG, SAP AG, and Deutsche Flugsicherung.

Which industries is Michael most experienced in?

Michael is most experienced in industries like Information Technology, Aerospace and Defense, and Banking and Finance. Michael also has some experience in Manufacturing and Transportation.

Which business areas is Michael most experienced in?

Michael is most experienced in business areas like Information Technology, Operations, and Project Management. Michael also has some experience in Business Intelligence.

Which industries has Michael worked in recently?

Michael has recently worked in industries like Aerospace and Defense, Information Technology, and Banking and Finance.

Which business areas has Michael worked in recently?

Michael has recently worked in business areas like Information Technology, Project Management, and Operations.

What is Michael's education?

Michael holds a Doctorate in Computer Science from Friedrich-Alexander University Erlangen.

Does Michael have any certificates?

Michael has 1 certificate: IT Systems Administrator.

What is the availability of Michael?

Michael is immediately available full-time for suitable projects.

What is the rate of Michael?

Michael's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.