Thomas Röschner
Self-employed / Freelancer
Experience
Aug 2018 - Present
7 years Larnaca, Cyprus
Self-employed / Freelancer
Roeschner-IT-Consultant Ltd
General freelance activities:
- Cisco IronPort / File Server datacenter move.
- DHCP / DNS upgrade from 2008R2 to 2019 and datacenter move.
- RDS/RDSH server environment, Active Directory, GPO.
- VMware 6.5/6.7 Enterprise cluster environment.
- OpCon-Veritas-Veeam backup systems.
- Development of PowerShell / PowerCLI scripts to automate recurring administrative processes and rollouts and automatic creation of regular reports.
- Bitlocker project.
- GPO adjustments.
- FTP Enterprise, WSUS.
- Server migration 2008R2 to 2012/2016.
- Monitoring system adjustments "Icinga".
Projects and engagements:
- Project: Raise domain functional level in production environment in Aachen (05.07.2021 – 30.06.2023). Location: Aachen, Germany.
- DFL / FFL 2008R2 to 2016, ESX, Proxmox: Setup of VMware HA cluster environments including vSphere 6 / 6.5 / 6.7 / 7 / 7.5 on Intel Xeon x86 processors on server hardware (DELL / HPE / Fujitsu) and storages Nimble / Synology / Qnap / SAN.
- Veeam backup planning and administration of large VMware virtualization environments.
- Zabbix, DNS / DHCP scopes, domain controller schema adjustments to LDAP structures in AD.
- Handling ticket systems.
- Server provisioning (IIS/Altrium/Winline etc.).
- Microsoft server setup and updates.
- Storage maintenance (Synology/Nimble).
- Project: Server adjustments and migration of all servers to the cloud / datacenter Cuxhaven, Bremerhaven (03.12.2020 – 05.02.2021). Location: Cuxhaven, Bremerhaven, Germany.
- Project: Migration / rebuild infrastructure in data center Frankfurt am Main (01.10.2020 – 31.10.2020). Location: Frankfurt am Main, Germany.
- Project: Complete server / client structure setup for G-LOG (28.02.2020 – 12.05.2020).
- Engagement as administrator at ITZBund (15.06.2019 – 28.02.2020).
- Engagement at Friatec / Aliaxis (Role: Server / VMware / Projects / Script Developing) (14.01.2019 – 15.06.2019).
- Engagement as server administrator at Heinzel (01.08.2018 – 14.01.2019).
Jun 2017 - Feb 2018
9 monthsSystem Administrator / POS Systems Europe-wide
Bahag AG
- Administration of POS cashier systems based on Windows 10.
Feb 2017 - Apr 2017
3 monthsSystem Administrator
Brandmauer IT
Nov 2014 - Jan 2017
2 years 3 monthsSystem Administrator
Wircon Interservices GmbH (Hosting)
- Web hosting using Debian Linux servers in an HA cluster on the Xen and ESXi virtualization platforms.
- Installation, configuration, and maintenance of vServers in the HA cluster.
- AD administration of Office Server 2012, Citrix Server, and SQL Server.
- AD administration for external corporate clients and network monitoring of all servers and clients via Hobbit.
- Expansion of the data center with servers, storages, HP and Cisco switches.
- Connecting the internal/external data center and office network via LAN, fiber optic and microwave links.
- Expansion of video surveillance indoors and outdoors.
- VPN setup and administration of office laptops and routers using OpenVPN.
- Client support in the office environment with Windows 8.1 and 10 and printers from Canon and Kyocera.
- Office migration to Microsoft Office 365 and Outlook 2016.
- Administration of the Exchange Server Office 365.
- Installation of license servers for AutoCad / Autodesk LT / iTWO / Print2CAD / See Electric Advanced.
- Installing and programming IP phones and smart phones (Android / Apple iOS / Windows Phone).
- Evaluating various DJI drones for use in WIRSOL Group solar parks.
- Creating and testing 3D models for 3D printing using the Witbox 2.
- Third level support for WHMCS, Plesk and cPanel via ticket system.
- Building control and monitoring cabinets for solar parks using Beckhoff systems with LTE and VPN links to headquarters.
- Administration of various backup systems like Xen, Norton, Cloud-Backup.
- Global OwnCloud administration.
Jun 2013 - Dec 2014
7 monthsSystem Administrator
Caritas e.V.
- Support for Windows 8.1 and Office 2013 users.
- Server administration Citrix Microsoft 2008/2012 in all branches.
Jan 2010 - Jun 2012
1 year 6 months Frankfurt, Germany
Application Engineer (External)
Lufthansa Technik
- Application engineering.
- Software packaging.
- SCCM deployment.
- Software evaluation for Windows operating systems.
- VMware ESX; VMWorkstation 7.x/8.0.
- Scripting for SCCM rollout wrappers.
- Novell, I2L, MS Office 2010.
- Lufthansa programs – script adjustments (Win7).
Mar 2000 - Dec 2010
10 years 10 months Walldorf, Germany
Support Engineer (Contractor)
SAP AG
- Planning and implementation of Windows 2000 / 2003 / 2008R2 servers.
- Windows NT 4.0 migration to Windows 2000/2003/2008.
- Active Directory troubleshooting.
- Analysis and resolution of hardware and software issues.
- Replacement of computers, cards (network, graphics, memory, motherboard etc.), TFT monitors.
- Solving dial-in issues on laptops (software, hardware, user errors).
- Solving network access issues.
- Replacement of front-end network components (hubs, switches, cables, fiber optics).
- Network management and administration.
- Data backup for users.
- Data recovery from faulty hard drives.
- User support for hardware and software.
- Firewall installation and configuration.
- MS SQL Server configuration.
- Server installations and management.
- Troubleshooting of R3 applications and various R3 transactions.
- Support for customer standard software.
- Board area support (executives, assistants, secretaries).
- Conference rooms, video conferences, and Cisco TelePresence.
- Installation and troubleshooting of WinNT4.0/Win2000/WinXP/Vista Enterprise.
- 2nd level support for client environments including applications (MS Office, Win98, 2000, XP, Server 2003, 2008/SAP R/3, antivirus/firewall/SafeBoot/databases/encryption software).
- PCs, servers, networks, mobile phones, BlackBerry, UMTS cards for laptops, projectors, printing.
- Developer support (HANA project) at SAP Labs.
System support (2008):
- Support of server environment in Windows 2003/2008 for a major client.
- Administration of the server landscape.
- Hardware monitoring with Insight Manager 7.0.
- Client support Windows XP and Office 2003/2007/2010 Outlook.
- Administration of servers under Windows 2003.
- Hardware monitoring planning with Insight Manager.
- Support of SharePoint Portal Server 2003.
- Data backup with Veritas Backup Exec v10.5.
- Global group policy setup.
Windows 7 Migration Project:
- Planning, preparation, and implementation of NT 4.0 migration to Windows 2003 Active Directory.
- Migration of Exchange 5.5 to Exchange 2003.
- Planning, integration, and configuration for Microsoft WSUS introduction.
- Migration strategy planning.
- Hardware concept for existing server landscape.
- Execution of Windows NT 4.0 to Windows 2003 server migration.
- Exchange 5.5 to Exchange 2003 migration.
- Antivirus solution implementation.
- Remote access solution (VPN, UMTS).
- WSUS server installation and configuration.
- WSUS groups and GPO creation.
- Synchronization testing between downstream, upstream servers and clients.
- Remote maintenance access (Astaro dial-in router).
Windows 7 Migration Project:
- Planning, preparation, and execution of Windows 2000 migration to Windows 2003 Active Directory.
- Integration and migration strategy planning.
- Server installation and configuration.
- Migration execution.
- Data backup setup (NT Backup).
- Remote access setup for maintenance (Cisco dial-in router).
Data center relocation:
- Planning, preparation, and consolidation of standalone Windows 2000 servers.
- Move strategy planning.
- Network infrastructure setup and commissioning of network components.
- Exchange 2003 planning and installation.
- Data backup setup (Veritas Backup Exec v10.5).
Aug 1996 - Oct 1996
3 months Ludwigshafen, Germany
IT Internship
AOK
- Network migration from Novell to TCP/IP.
Jan 1996 - Dec 2000
5 years Balneário Camboriú, Brazil
IT Activities
- Network connections (client-server environment).
- PC/Laptop support.
May 1995 - Aug 1995
4 months Mannheim, Germany
Chemist Operator
Boehringer Mannheim
Sep 1993 - Dec 1994
1 year 4 months Ludwigshafen, Germany
Laboratory Technician
Alcoa
- Fixed-term contract.
Languages
German
Native
Portuguese
Advanced
Education
Sep 1995 - Dec 1997
CDI
Training as a PC Administrator · PC Administrator · Mannheim, Germany
Jun 1991 - May 1993
Franz Zang School of Natural Sciences
Training as a Chemical Technical Assistant (CTA) · Chemical Technical Assistant · Ludwigshafen, Germany
Jun 1987 - May 1990
Technical High School
Technical Diploma · Heidelberg, Germany
Certifications & licenses
MCPD (App Developer for Enterprises in .NET C#)
Gfn-AG
MCTS .NET Framework 3.5, ADO.NET Applications
Microsoft
MCTS .NET Framework 3.5, ASP.NET Applications
Microsoft
MCTS .NET Framework 3.5, Windows Forms Applications
Microsoft
MCTS Windows 7: Configuration
Microsoft
MCTS Windows Server 2008 Active Directory, Configuring
Microsoft
MCTS Windows Server 2008 Network Infrastructure, Configuration
Microsoft
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