Marco Köhl - Freelancer

Q: Where is Marco based?

Marco is based in Zell (Mosel), Germany .

Q: What languages does Marco speak?

Marco speaks the following languages: German (Native), English (Advanced), French (Elementary) .

Q: How many years of experience does Marco have?

Marco has at least 21 years of experience. During this time, Marco has worked in at least 5 different roles and for 15 different companies . The average length of individual experience is 1 year . Note that Marco may not have shared all experience and actually has more experience.

Q: What is Marco's latest experience?

Marco's most recent position is Freelancer at IBM Deutschland GmbH NGNCC .

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

In recent years, Marco has worked for IBM Deutschland GmbH NGNCC , Payment processing service provider , and Messe Frankfurt GmbH .

Q: Which industries is Marco most experienced in?

Marco is most experienced in industries like Information Technology (IT) , Banking and Finance , and Professional Services . Marco also has some experience in Education , Aerospace and Defense , and Manufacturing .

Q: Which business areas is Marco most experienced in?

Marco is most experienced in business areas like Information Technology (IT) , Operations , and Product Development . Marco also has some experience in Project Management and Customer Service .

Q: Which industries has Marco worked in recently?

Marco has recently worked in industries like Information Technology (IT) , Professional Services , and Banking and Finance .

Q: Which business areas has Marco worked in recently?

Marco has recently worked in business areas like Information Technology (IT) and Operations .

Recommended expert

Zell (Mosel), Germany

Experience

Nov 2021 - Present

4 years 4 months

Frankfurt, Germany

Freelancer

IBM Deutschland GmbH NGNCC

Design and setup of infrastructure concepts for virtualized servers with VMware vSphere and VMware vCenter
Migration from vCenter 7 environments to vCenter 8
Automated deployment of virtual machines using Microsoft PowerShell and VMware PowerCLI as well as Ansible Tower
Prototype setup and test migration of applications in various container environments
Administration of firewalls and network components (routing and switching)
Migration of VPN connection for all employees from Sophos UTM to Fortigate IPSec VPN with FortiToken
Automation of OS installations on Linux with Ansible and GitLab
VMware vSphere 8 with VMware vCenter 8
VMware API
VMware NSX-T
VMware vSAN
VMware Tanzu
Red Hat OpenShift
Docker
SLES 15, Red Hat 9 and Microsoft Windows Server
Microsoft Windows PowerShell
GitLab
Ansible Tower (AWX)
SUSE Manager 4 and 5
Fortigate Firewalls
Fortinet Analyzer and Manager
Juniper and Cisco switches and routers

Dec 2020 - Jun 2021

7 months

Wiesbaden, Germany

Freelancer

Payment processing service provider

Hardening of Linux systems according to CIS guidelines
Puppet Enterprise
Red Hat Satellite
Red Hat Enterprise Linux 6 and 7
Red Hat OpenShift
Atlassian Confluence

Oct 2020 - Nov 2020

2 months

Cologne, Germany

Freelancer

Bank Verlag GmbH

Planning, execution and support of the migration from Spacewalk to Foreman with Katello
Spacewalk
Foreman with Katello (upstream of Red Hat Satellite)
Microsoft Active Directory

Dec 2018 - Mar 2021

2 years 4 months

Frankfurt, Germany

Freelancer

Messe Frankfurt GmbH

Planning and execution of the migration of a FreeIPA environment including integration with Active Directory
Planning and execution of the migration from Spacewalk to Foreman with Katello and Puppet
Update of the existing Spacewalk server
Maintenance of the entire server landscape
Creation of a security concept according to BSI guidelines
FreeIPA
Spacewalk
Foreman with Katello (upstream of Red Hat Satellite)
Microsoft Active Directory
Red Hat Enterprise Linux 6, 7 and 8
CentOS Linux 6, 7 and 8

Sep 2018 - Nov 2018

3 months

Schwäbisch Hall, Germany

Freelancer

Bausparkasse Schwäbisch Hall

Planning and execution of the migration of virtualized servers with VMware vSphere and VMware vCenter from version 6.0 to 6.7
Architecture of the new platform design under vCenter 6.7
Script creation for Icinga to monitor vCenter
VMware vSphere 6.0 and 6.7 with VMware vCenter 6.0 and 6.7
VMware Operations Manager
VMware PowerCLI
Microsoft Windows Server 2012 and SQL Server 2014
Microsoft Windows PowerShell
Red Hat Enterprise Linux 6 and 7
Icinga monitoring

Jan 2018 - Jun 2018

6 months

Freelancer

Aviation Financial Services Provider

Created a cloud migration concept
Migrated the entire Linux IT infrastructure from VMware to Microsoft Azure Cloud
Integrated the DevOps toolchain
Hardened RHEL 7 according to PCI requirements and CIS benchmarks
Set up a Red Hat Satellite update structure across multiple regions
Integrated software components into Active Directory and Azure Active Directory
Microsoft Azure (with CLI, PowerShell, and ARM templates)
Red Hat Enterprise Linux 7
Red Hat Satellite 6.3
Ansible Tower
Docker with Red Hat OpenShift and Kubernetes
Windows Server 2016 with Active Directory
Active Directory and Azure Active Directory
Microsoft Office 365
Jira

Mar 2017 - Dec 2017

10 months

Frankfurt, Germany

Freelancer

IBM Deutschland GmbH NGNCC

Designed and built infrastructure concepts for virtualized servers with VMware vSphere and VMware vCenter 6.5
Automated deployment of virtual machines using Microsoft PowerShell and VMware PowerCLI
VMware vSphere 6.5 with VMware vCenter 6.5
VMware API
Lenovo xSeries (x3550, x3650)
SLES 12 SP1 and Microsoft Windows Server 2014
Microsoft Windows PowerShell
Git

Apr 2016 - Mar 2017

1 year

Bad Homburg, Germany

Freelancer

HPE

Infrastructure design for automation
Implemented automated installations
VMware vSphere 5.5 with VMware vCenter 5.5
HP OO (Operations Orchestration)
HP SA (Server Automation)

Feb 2016 - Mar 2016

2 months

Frankfurt, Germany

Freelancer

Vodafone

Infrastructure design in cloud and hosting
Architected custom customer solutions
VMware vSphere 5.5 with VMware vCenter 5.5
VMware vRealize Automation Center (vCAC)
EMC VMAX

Sep 2015 - Dec 2015

4 months

Schwäbisch Hall, Germany

Freelancer

Bausparkasse Schwäbisch Hall

Planned and executed the migration of virtualized servers with VMware vSphere and VMware vCenter from version 5.5 to 6.0
Architected the new platform design under vCenter 6.0
VMware vSphere 5.5 and 6.0 with VMware vCenter 5.5 and 6.0
VMware Operations Manager
VMware PowerCLI
Microsoft Windows Server 2012 and SQL Server 2014
Microsoft Windows PowerShell

Jun 2014 - Jul 2015

1 year 2 months

Frankfurt, Germany

Freelancer

Deutsche Bank AG

Engineering and architecture of the global virtualization platform
Migration of virtualized servers with VMware vSphere and VMware vCenter from version 4.1 to 5.1
Automated update and change procedures with Microsoft PowerShell and VMware PowerCLI
Coordination of changes in a global IT structure
VMware vSphere 5.1 with VMware vCenter 5.1
VMware PowerCLI
Microsoft Windows 2008 Server and SQL Server 2012
Microsoft Windows PowerShell
Subversion as version control system
HP blade servers and EMC storage systems

Aug 2013 - Sep 2014

1 year 2 months

Frankfurt, Germany

Freelancer

IBM Deutschland GmbH NGNCC

Design and setup of infrastructure concepts for virtualized servers with VMware vSphere and VMware vCenter 5.5
Highly available management of VMware vCenter 5.5 using VMware vCenter Heartbeat 6.6 and VMware API
Automated deployment of virtual machines with Microsoft PowerShell and VMware PowerCLI
Architecture and implementation of highly available services on Linux with Pacemaker
VMware vSphere 5.5 with VMware vCenter 5.5
VMware vCenter Heartbeat 6.6
VMware API
IBM xSeries (x3550, x3650)
IBM Storage (DS4700, DS4300)
SLES 11 SP3 and Microsoft Windows 2012 Server
Microsoft Windows PowerShell
GIT
Pacemaker

Oct 2012 - Oct 2013

1 year 1 month

Frankfurt, Germany

Freelancer

Commerzbank AG

IT architecture and partial project management for LDAP consolidation
Creation of authorization concepts
Solaris 8/9/10, Linux, Windows Server 2008
BASH, Perl
IBM ClearCase
Eclipse
Summit

Jul 2012 - Dec 2012

6 months

Mainz, Germany

Freelancer

IBM Deutschland GmbH Global Technologie Services

IT architecture for offering support
Implementation of new support processes for open-source software
Test installation and fixing of OpenStack (Python)
openSUSE, Fedora, CentOS
SLES / RHEL
OpenStack
SAMBA
VMware

Jan 2012 - May 2012

5 months

Hamburg, Germany

Freelancer

HAUNI AG

Administration of LAN/WAN based on Cisco routers and HP switches with OSPF and port security
Administration of Linux servers (SLES 11) to provide network services on DELL hardware
Hardening servers against external attacks from the internet
Administration of DNS/DHCP/LDAP/RADIUS services
1st and 2nd level support
Cisco routers
SLES 11, openSUSE and Knoppix
VMware

Jan 2011 - Dec 2011

1 year

Frankfurt, Germany

Freelancer

IBM Deutschland GmbH NGNCC

Design and setup of infrastructure concepts for virtualized servers with VMware vSphere and VMware vCenter 5.0
Introduction of IPv6 in test and production environments (routing and firewalls)
Development and implementation of user management for AIX and Linux based on LDAP in the production system
Administration of Linux servers (SLES11)
1st- and 2nd-level support
Fortigate Fortinet 310b
vSphere 5.0 with vCenter
IBM xSeries (x3550, x3650)
IBM Storage (DS4700, DS4300)
SLES11 and Windows 2008 Server
Rational ClearCase/ClearQuest
Ticket system OTRS
OpenLDAP
Perl
CVS and GIT

Jan 2008 - Dec 2010

3 years

Frankfurt, Germany

IT Specialist/Architect

IBM Deutschland GmbH

Design, setup and integration of new infrastructure concepts for clients (network, SAN, storage, servers)
Configuration of network components (Cisco, Nortel, Juniper)
Management of firewalls (Astaro and Lucent Brick)
Administration of virtual machines with VMware vSphere and XEN
Automated installation of Linux servers with CMS and xCAT
Data backups with IBM Tivoli Storage Manager
Administration of Apache, MyDNS, MySQL on Linux (SLES)
User support
Astaro Security Gateway 320
IBM TSM Server 5.5
IBM xSeries (x3550, x3650)
IBM Storage (DS4700, DS4300)
IBM BladeCenter (BC-E, BC-H, HS20-22, JS20)
IBM AIX 5.3-6.1

Jan 2006 - Dec 2007

2 years

Mainz, Germany

Linux System Administrator

Max-Planck-Institut

Administration of NIS/NFS/SSH services
Administration and expansion of the Linux-based cluster
Administration of the IBM Regatta on AIX
Data backups with IBM Tivoli Storage Manager
Compiling and installing new software
Administration of Windows 2000 Terminal Server
1st-level support

May 2005 - Aug 2005

4 months

Frankfurt, Germany

Thesis

IBM Deutschland GmbH

Extensions of the IBM ADMIRA solution for LAN-free data transfer
Development in C and Java
Deployment on Linux and AIX with IBM GPFS and TSM

Sep 2004 - Feb 2005

6 months

Frankfurt, Germany

Internship

IBM Deutschland GmbH

Setup of a highly scalable management system for media assets at the client's site
Operating systems: AIX, Linux, Mac OS X, Windows 2000
Applications: Oracle 8, IBM SANFS, IBM ADMIRA, IBM TSM

Mar 2003 - May 2004

1 year 3 months

VERC (Virtual European Recycling Center) FH Trier

Building a European recycling portal
Developing a web application in WebObjects 5.3

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (12 years), Banking and Finance (3.5 years), Professional Services (3.5 years), Education (2 years), Aerospace and Defense (0.5 years), and Manufacturing (0.5 years).

Information Technology

Banking and Finance

Professional Services

Education

Aerospace and Defense

Manufacturing

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (21 years), Operations (12.5 years), Project Management (1 year), Customer Service (1 year), and Product Development (1 year).

Information Technology

Operations

Project Management

Customer Service

Product Development

Skills

Analytical Problem Solving
Design And Configuration Of It Infrastructures In The Cloud And On-premise
Administration Of Linux, Windows And Vmware Vsphere
Implementation Of Customer Requirements Into Technical Specifications And Architectures

Languages

German

Native

English

Advanced

French

Elementary

Education

Sep 2001 - Aug 2005

FH Trier

Diploma · Applied Computer Science · Trier, Germany

Aug 2000 - Jun 2001

BBS Cochem

Technical college entrance qualification · Cochem, Germany

Certifications & licenses

VMware Certified Professional (VCP-DCV)

Introduction To Kubernetes – The Linux Foundation

VMware Certified Professional 6 (VCP-DCV)

MCSD (Microsoft Certified Solutions Developer)

Microsoft Azure Solutions Architect

CISCO Re-certification (CCDA, CCNA)

ITIL Foundation

PRINCE2 Foundation

VMware Certified Professional 5 (VCP)

CISCO Re-certification (CCNA)

CISCO certification (CCDA)

LPI Level 2 Certification

Cisco certification (CCNA)

Profile

Created

November 2025

Need a freelancer? Find your match in seconds.

Try FRATCH GPT

Frequently asked questions

Do you have questions? Here you can find further information.

Where is Marco based?

Marco is based in Zell (Mosel), Germany.

What languages does Marco speak?

Marco speaks the following languages: German (Native), English (Advanced), French (Elementary).

How many years of experience does Marco have?

Marco has at least 21 years of experience. During this time, Marco has worked in at least 5 different roles and for 15 different companies. The average length of individual experience is 1 year. Note that Marco may not have shared all experience and actually has more experience.

What roles would Marco be best suited for?

Based on recent experience, Marco would be well-suited for roles such as: Freelancer, IT Specialist/Architect, Linux System Administrator.

What is Marco's latest experience?

Marco's most recent position is Freelancer at IBM Deutschland GmbH NGNCC.

What companies has Marco worked for in recent years?

In recent years, Marco has worked for IBM Deutschland GmbH NGNCC, Payment processing service provider, and Messe Frankfurt GmbH.

Which industries is Marco most experienced in?

Marco is most experienced in industries like Information Technology (IT), Banking and Finance, and Professional Services. Marco also has some experience in Education, Aerospace and Defense, and Manufacturing.

Which business areas is Marco most experienced in?

Marco is most experienced in business areas like Information Technology (IT), Operations, and Product Development. Marco also has some experience in Project Management and Customer Service.

Which industries has Marco worked in recently?

Marco has recently worked in industries like Information Technology (IT), Professional Services, and Banking and Finance.

Which business areas has Marco worked in recently?

Marco has recently worked in business areas like Information Technology (IT) and Operations.

What is Marco's education?

Marco attended FH Trier for Applied Computer Science.

Does Marco have any certificates?

Marco has 13 certificates. Among them, these include: VMware Certified Professional (VCP-DCV), Introduction To Kubernetes – The Linux Foundation, and VMware Certified Professional 6 (VCP-DCV).

What is the availability of Marco?

Marco is immediately available for suitable projects.

What is the rate of Marco?

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