Thomas Röschner - IT Consultant

Q: Where is Thomas based?

Thomas is based in Larnaca, Cyprus and prefers 100% remote projects.

Q: What languages does Thomas speak?

Thomas speaks the following languages: German (Native), Portuguese (Advanced) .

Q: How many years of experience does Thomas have?

Thomas has at least 32 years of experience. During this time, Thomas has worked in at least 15 different roles and for 18 different companies . The average length of individual experience is 1 year and 5 months . Note that Thomas may not have shared all experience and actually has more experience.

Q: What is Thomas's latest experience?

Thomas's most recent position is IT Consultant at Self-employed / Freelancer .

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

In recent years, Thomas has worked for Self-employed / Freelancer .

Q: Which industries is Thomas most experienced in?

Thomas is most experienced in industries like Information Technology , Aerospace and Defense , and Energy . Thomas also has some experience in Metals and Mining , Government and Administration , and Manufacturing .

Q: Which business areas is Thomas most experienced in?

Thomas is most experienced in business areas like Information Technology , Operations , and Customer Service . Thomas also has some experience in Quality Assurance , Human Resources , and Production .

Q: Which industries has Thomas worked in recently?

Thomas has recently worked in industries like Information Technology .

Q: Which business areas has Thomas worked in recently?

Thomas has recently worked in business areas like Information Technology and Operations .

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Larnaca, Cyprus

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Experience

Jul 2021 - Jun 2023

2 years

IT Consultant

Self-employed / Freelancer

Raised the domain functional level of the production environment in Aachen from DFL/FFL 2008R2 to 2016.
Set up and administered VMware HA cluster environments (vSphere 6 / 6.5 / 6.7 / 7 / 7.5) on Intel Xeon x86 server hardware (Dell, HPE, Fujitsu).
Designed and operated storage solutions (Nimble, Synology, Qnap, SAN), including maintenance.
Created and implemented Veeam backup concepts and administered large VMware virtualization structures.
Administered Zabbix, DNS/DHCP scopes, and adjusted domain controller schemas to LDAP structures in Active Directory.
Used and maintained ticket systems, server provisioning (including IIS, Altrium, Winline), and carried out Microsoft server installations and updates.
Maintained and operated storage systems (Synology, Nimble).

Dec 2020 - Feb 2021

3 months

IT Consultant

Self-employed / Freelancer

Adjusted and migrated all servers to the cloud or to a data center in Cuxhaven and Bremerhaven.
Planned and carried out the migration, including preparing the infrastructure and ensuring service availability.
Configured network, storage, and backup components in the new data center environment.

Oct 2020 - Oct 2020

1 month

IT Consultant

Self-employed / Freelancer

Migrated and rebuilt an IT infrastructure in a data center in Frankfurt am Main.
Planned and implemented the server and network environments, including virtualization.
Ensured system availability and performance in the new data center setup.

Feb 2020 - May 2020

4 months

IT Consultant

G-LOG

Complete setup of the server and client structure.
Planning and implementation of the Windows and network environment.
Introduction of backup, security, and administration processes for the new infrastructure.

Jun 2019 - Feb 2020

9 months

Administrator

ITZBund

Jan 2019 - Jun 2019

6 months

Server / VMware Administrator / Script Developer

Friatec / Aliaxis

Aug 2018 - Present

8 years

IT Consultant

Self-employed / Freelancer

Worked as an IT consultant and system administrator with a focus on Microsoft and virtualization infrastructures.
Carried out various projects in the areas of server administration, virtualization, data center migrations, and cloud migrations.
Used modern backup, storage, and monitoring solutions in enterprise environments.

Aug 2018 - Jan 2019

6 months

Server Administrator (Freelancer)

Heinzel

Jun 2017 - Feb 2018

9 months

System Administrator

Bahag AG

Administration of POS cash register systems based on Windows 10 across Europe.
Support of server and client environments in branch and central office settings.
Ensuring the availability and stability of cash register and backend systems.

Feb 2017 - Apr 2017

3 months

System Administrator

Brandmauer IT

Nov 2014 - Jan 2017

2 years 3 months

System Administrator

Wircon Interservices GmbH

Operation and further development of a hosting environment.
Web hosting with the Linux distribution Debian Server in a HA cluster on Xen and ESXi.
Installation, configuration, and maintenance of vServers in a HA cluster.
Administration of the Active Directory environment for Office Server 2012, Citrix Server, and SQL Server.
AD administration for external business customers as well as network monitoring of all servers and customers with Hobbit.
Expansion of the data center with servers, storage, and HP and Cisco switches.
Connection of the data center and office network internally/externally via LAN, fiber optic, and microwave link.
Expansion of video surveillance indoors and outdoors.
Setup and administration of VPN for office laptops and routers using OpenVPN.
Client support in the office area with Windows 8.1 and 10 as well as printers from Canon and Kyocera.
Office migration to Microsoft Office 365 and Outlook 2016.
Administration of Exchange Server Office 365.
Installation of license servers for AutoCAD, Autodesk LT, iTWO, Print2CAD, and See Electric Advanced.
Installation and programming of IP phones as well as smartphones (Android, Apple iOS, Windows Phone).
Evaluation of DJI drones for use in solar parks.
Creation and testing of 3D models for 3D printing with the Witbox 2.
Third-level support for WHMCS as well as Plesk and cPanel via a ticket system.
Build-up of control and monitoring cabinets for solar parks with Beckhoff systems as well as connection via LTE and VPN to the company headquarters.
Administration of various backup systems (Xen, Norton, cloud backup).
Global OwnCloud administration.

Jan 2014 - Oct 2014

10 months

Further training

Jun 2013 - Dec 2013

7 months

System Administrator

Caritas e.V.

Administration of Windows 8.1 environments as well as Office 2013.
User support for Office and Windows clients.
Server administration of Citrix and Microsoft servers (2008/2012) in all branch offices.

Nov 2012 - May 2013

7 months

Participant MCPD Certification (.NET C#)

Gfn-AG

Jan 2011 - Jun 2012

1 year 6 months

Application Engineer (External)

Lufthansa Technik

Assignment as an external Application Engineer at Lufthansa Technik in Frankfurt.
Application engineering, software packaging, and SCCM deployment.
Software evaluation for Windows operating systems.
Use of VMware ESX and VMware Workstation 7.x/8.0.
Scripting for wrappers in SCCM rollout.
Working with Novell, I2L, and MS Office 2010.
Customization of Lufthansa-internal program scripts for Windows 7.

Feb 2008 - Dec 2010

2 years 11 months

Support Engineer (Developer Support, HANA Project)

SAP Labs

Jan 2007 - Feb 2008

1 year 2 months

Support Engineer

Board Area Support, SAP AG

Support for the Board Area (board members, assistants, and secretaries).
Support for conference rooms, video conferences, and Cisco TelePresence systems.
2nd-level support for client environments (Windows and standard applications) for top management.

Mar 2000 - Dec 2007

7 years 10 months

Walldorf, Germany

Support Engineer

SAP AG

Planning and implementation of Windows servers (2000, 2003, 2008 R2) in enterprise environments.
Migration from Windows NT 4.0 to Windows 2000/2003/2008.
Troubleshooting in Active Directory as well as analysis and fixing of hardware and software problems.
Replacement and maintenance of computer hardware (network, graphics, storage, motherboard cards, TFT monitors).
Solving dial-up problems on laptops (software, hardware, user errors).
Fixing network problems (access to network resources) and replacing network components in the frontend area (hubs, switches, cables, fiber optic).
Network management and administration, data backup for users, as well as data recovery of broken hard drives.
User support with hardware and software usage.
Installation and configuration of firewalls and MS SQL servers.
Server installations, server administration, and troubleshooting of R/3 applications and transactions.
Support for customer standard software.
Installations and troubleshooting of Windows NT 4.0, 2000, XP, and Vista Enterprise.
2nd-level support for client environments including MS Office, Windows 98/2000/XP, Windows Server 2003/2008, SAP R/3, antivirus software, firewalls, SafeBoot, databases, and encryption software.
Support for PCs, servers, networks, mobile phones, BlackBerrys, UMTS cards for laptops, projectors, and printers.
Support of the server environment in a Windows 2003/2008 setup for a major customer.
Administration of the server landscape and hardware monitoring with HP Insight Manager 7.0.
Support in the client environment under Windows XP with Office 2003/2007/2010 and Outlook.
Administration of the server landscape under Windows 2003 and support of SharePoint Portal Server 2003.
Data backup with Veritas Backup Exec 10.5.
Setup of new group policies worldwide.
Planning, preparation, and implementation of a migration from NT 4.0 to Windows 2003 Active Directory.
Migration from Exchange 5.5 to Exchange 2003.
Planning, integration, and configuration during the introduction of Microsoft WSUS.
Design of the hardware for building the server landscape and execution of the migration.
Implementation of virus protection solutions and remote access (VPN, UMTS), including WSUS server installation, GPO creation, and testing of synchronization between downstream/upstream servers and clients.
Planning and implementation of a Windows 2000 migration to Windows 2003 Active Directory, including server installation, migration, NT backup setup, and remote access with Cisco dial-up routers.
Planning and execution of a data center move with consolidation of several Windows 2000 server systems.
Planning and installation of the network infrastructure, commissioning of network components, as well as planning and installation of Exchange 2003 including data backup with Veritas Backup Exec 10.5.

Aug 1996 - Oct 1996

3 months

Ludwigshafen, Germany

IT Intern

AOK

Support during the network switch from Novell to TCP/IP.
Assistance with the migration of network services and clients to the new infrastructure.

Jan 1996 - Dec 2000

5 years

Balneário Camboriú, Brazil

IT Activities in a Client-Server Environment

IT tasks in a client-server environment.
Network connections and support for PCs and laptops.

May 1995 - Aug 1995

4 months

Mannheim, Germany

Chemical Technician

Boehringer Mannheim

Sep 1993 - Dec 1994

1 year 4 months

Ludwigshafen, Germany

Laboratory Technician

Alcoa

Worked as a laboratory technician in the chemistry field (fixed-term contract).

Jul 1990 - Jun 1991

1 year

Germany

Soldier / Corporal (Maintenance / Staff Service, responsible IT tasks)

Bundeswehr

Military service with the rank of Corporal.
Worked in maintenance and staff service.
Responsible for IT-related tasks within the area of responsibility.

Industry Experience

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

Experienced in Information Technology, Aerospace and Defense, Energy, Metals and Mining, Government and Administration, and Manufacturing.

Information Technology

Aerospace and Defense

Energy

Metals and Mining

Government and Administration

Manufacturing

Business Area Experience

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

Experienced in Information Technology, Operations, Customer Service, Quality Assurance, Human Resources, and Production.

Information Technology

Operations

Customer Service

Quality Assurance

Human Resources

Production

Skills

Hardware: Hp Server, Dell Server, Lenovo/Fujitsu Laptops, Workstations, Dual Hexacore Hp Developer Workstations Hp Z600
Operating Systems: Windows 7 / 8.X / 10 / Server 2003 / Server 2008 R2 / Server 2012
Tools/Software: Microsoft Office 2013/2016 & O365, F5 Vpn Client, Sso Single Sign On, Sap Gui, Ipass, Mcafee Antivirus, Iron Mountain Backup Tool, Citrix, Vmware Client, Hp System Insight Manager 7.0, Microsoft Operations Manager 2005, Sysinternals, Recovery Tools
Network Knowledge: Routers, Managed Switches, Tcp/Ip, Network Infrastructure (Wins, Dns, Dhcp)

Languages

German

Native

Portuguese

Advanced

Education

Sep 1995 - Dec 1996

CDI

Training as PC Administrator · PC Administrator · Mannheim, Germany

Jun 1991 - May 1993

Franz Zang School for Natural Sciences

Training as Chemical Technical Assistant (CTA) · Chemical Technical Assistant (CTA) · Ludwigshafen, Germany

Jun 1987 - May 1990

Technical High School

University entrance qualification · Heidelberg, Germany

...and 1 more

Certifications & licenses

MCPD (App Developer for Enterprises in .NET C#)

Gfn-AG

MCTS .NET Framework 3.5, ADO.NET Applications

MCTS .NET Framework 3.5, ASP.NET Applications

MCTS .NET Framework 3.5, Windows Forms Applications

MCTS Windows 7: Configuration

MCTS Windows Server 2008 Active Directory, Configuring

MCTS Windows Server 2008 Network Infrastructure, Configuration

Statistics

Experience

Total positions 23

Experience in Information Technology 26.5 y

Avg length 1 y 7 m

Longest experience 7 y 11 m

Global Experience

Countries worked in 2 (Germany, Brazil)

Primary country Germany

Expertise

Recent roles IT Consultant, Administrator, Server / VMware Administrator / Script Developer

Main industries Information Technology, Aerospace and Defense, Energy

Main business areas Information Technology, Operations, Customer Service

Qualifications

Certifications earned 7

Profile

Created

October 2024

Last Update

July 2026

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Frequently asked questions

Have questions? Find more information here.

Thomas is based in Larnaca, Cyprus and prefers 100% remote projects.

Thomas speaks the following languages: German (Native), Portuguese (Advanced).

Thomas has at least 32 years of experience. During this time, Thomas has worked in at least 15 different roles and for 18 different companies. The average length of individual experience is 1 year and 5 months. Note that Thomas may not have shared all experience and actually has more experience.

Based on recent experience, Thomas would be well-suited for roles such as: IT Consultant, Administrator, Server / VMware Administrator / Script Developer.

Thomas's most recent position is IT Consultant at Self-employed / Freelancer.

In recent years, Thomas has worked for Self-employed / Freelancer.

Thomas is most experienced in industries like Information Technology, Aerospace and Defense, and Energy. Thomas also has some experience in Metals and Mining, Government and Administration, and Manufacturing.

Thomas is most experienced in business areas like Information Technology, Operations, and Customer Service. Thomas also has some experience in Quality Assurance, Human Resources, and Production.

Thomas has recently worked in industries like Information Technology.

Thomas has recently worked in business areas like Information Technology and Operations.

Thomas attended CDI for PC Administrator.

Thomas has 7 certificates. Among them, these include: MCPD (App Developer for Enterprises in .NET C#), MCTS .NET Framework 3.5, ADO.NET Applications, MCTS .NET Framework 3.5, and ASP.NET Applications.

Thomas is immediately available full-time for suitable projects.

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

To hire Thomas, click the Meet button on the profile to request a meeting and discuss your project needs.