Windows Server Experts in Dusseldorf
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Meet FRATCH Experts in Dusseldorf, who have recently used Windows Server
Christian Wonneberger
Last position:
Software Engineer, cross-platform Application Manager at International major bank
- Creating interfaces between the legacy platform and the new container solution
- Coordinating required contributions from line units
- Moderating regular status meetings with the software vendor
- Minimally invasive conversion of TWS scheduling from the old to the new platform
- Environment: IBM Mainframe, DB2, CICS, MQ, Red Hat Linux, Oracle, Kubernetes, Kafka, Helm, GitLab, Jenkins
Ralph Konitzer
Last position:
Product Owner / Business Owner at AXIS Management Consulting GmbH
- Full product responsibility from a business perspective: requirement analysis, UX design, product strategy, and go-to-market implemented without an internal dev team using fully AI-supported development (Claude Code / Anthropic)
- Technical differentiation: KRITIS-compliant air-gapped deployment (Windows/NSIS), GDT interface for PVS integration, DATEV-LODAS export for payroll
- Managed pilot operation with initial external client (Dormagen medical practice): structured requirement gathering, test support, error analysis, and release management
- Developed rollout and sales strategy for market entry in the segment of private practices and small medical centers
- Human-in-the-Loop development principle: business decision → AI implementation → manual review → approval → release – each sprint documented in Jira (TIME project), every change traceable via co-authored commits
- Product outcome: Tauri/Rust desktop app with GDT watcher, multi-tier model (Starter/Professional/Enterprise), cloud mirror on Hetzner/Traefik, complete ISMS framework based on ISO 27001 and BSI basic protection as product foundation
- Direct method validation for the test manager role: hands-on experience with quality assurance of AI-generated products from a user perspective, review gate discipline, release approval under GDPR and the EU AI Act
Boban Stamenkovic
Last position:
Senior Citrix Consultant & Architect, NetScaler Expert at Freelancer
- Design, installation, configuration, administration, optimization, and further development of IT infrastructures in Citrix environments
- Upgrading older Citrix systems to the latest versions
- Installation, configuration, and delivery of applications in Citrix environments
- Support in 2nd- and 3rd-level support
- Performing performance analyses and optimizations in complex Citrix environments
- Analysis and fixing of issues in complex Citrix systems
- Creating, updating, and maintaining technical documentation
- Troubleshooting slow logons in Citrix XenApp / CVAD environments
- Analysis and fixing of printer problems in Citrix environments
- Creating, maintaining, and optimizing Citrix VDI policies
- Citrix Virtual Apps and Desktops (CVAD) 2402 LTSR, Citrix Virtual Desktop Infrastructure (VDI), Citrix Hypervisor / Citrix XenServer, Citrix Director / Citrix StoreFront, Citrix Machine Creation Services (MCS) / Citrix Provisioning Services (PVS), Citrix App Layering, Citrix Workspace Environment Management (WEM), Citrix Profile Management
- NetScaler SDX 14 / NetScaler Gateway 14 / NetScaler Console 14, NetScaler Load Balancing / Global Server Load Balancing (GSLB), NetScaler Applications Analytics (Web Insights, Security Insights, SSL Insights, TCP Insights, Gateway Insights, HDX Insights, ADC Infrastructure Analytics)
- Design, installation, configuration, management, optimization, and further development of IT infrastructures in Microsoft environments
- Upgrading older Microsoft systems to the latest versions
- Installation, configuration, and delivery of applications in Microsoft environments
- Creating, managing, and optimizing Microsoft Group Policy policies
- Design, implementation, and administration of Microsoft Azure environments
- Windows Server 2022 / Windows 11, Windows Group Policy / Active Directory, Remote Desktop Services (RDS), SQL Server 2022 / SCCM Server, RADIUS Server, FSLogix, PowerShell
- Implementation of standard changes according to ITIL guidelines
- VMWare / Splunk
Alois Gruber
Last position:
Bank DZ Privatbank S.A.
- Various programming tasks as specified
- Work carried out from home office, meetings/tasks via email, phone and Microsoft Teams
- Version control via GIT
- Implementation with RDI, FreeSQL SQL
- Extension of automatic test environment creation as specified - adding automatic transfer of existing iSeries users and preparation as well as anonymization of test data
- Creation of trigger and service programs in SQLRPGLE, FreeRPG, ILE RPG and CLLE
- Development and implementation of the CallKredite project including additional extensions for other departments
- Conversion of RPG to Free-RPG and SQL as well as extension of existing modules as specified
- Migration to a new banking release
- Support for specialist segment / OIV
Jonas Sickel
Last position:
Subproject Manager / Consultant – d.3 DMS Solution Implementation at InterRisk Versicherungs-AG
- Planning the migration of the legacy archive to the new d.velop-documents platform
- Managing external service providers and internal project stakeholders
- Connecting existing systems to d.velop documents
- Project planning, control and reporting
Benjamin Wennmacher
Last position:
SAP Basis at IT Baden-Württemberg (BITBW)
- SAP Basis operations for complex SAP system landscapes (ABAP and Java stacks)
- Administration, monitoring, and optimization of SAP systems with regard to availability, performance, and stability
- Planning and execution of data center moves as well as migrations of SAP systems and databases
- Handling of incidents, changes, and problems according to ITIL processes, including root cause analyses
- Creation of technical concepts, operations documentation, and implementation plans
Technologies: SAP NetWeaver, ITIL processes, technical migrations
Bernhard Döpper
Last position:
Enterprise Architect. And responsible for the cross-functional architecture as well as all domains with a focus on the sales at Süddeutsche Krankenversicherung
Creation of business and technical concepts as well as support for enterprise architecture management as part of the migration to the Adesso standard insurance solutions and the renewal of surrounding systems
Interface definitions
Business analysis and creation of the business concepts for input management and sales
Creation of architecture guidelines and processes
Processing technical and business decisions in the architecture board
Definition of service processes and system management aspects
Creation of the technical target operating model
Creation of an integration architecture for AI/LLMs from the providers Commasoft and Insiders
CommaSoft (Alan) webpages and web services
Insiders for Smartfix based on web services
Creation of a question catalog for a security/regulatory check.
Analysis of threats using threat modeling / STRIDE incl. creation of a set of measures to secure the systems
System environment: Jira, Confluence, Java, Enterprise Architect, VAIT/DORA, KritisV, GDPR, IT ServiceMgmt, Adesso Ecosphere and Insure Health, DoPIX and successor product, SmartFix, SmartFlow, Zabas, Kolumbus, Clarc archive, BiPRO, AI / LLM, MS Azure, AWS, TOM/FMO
Olga Methner
Last position:
External IT Consultant BI and DWH at Telefónica Deutschland
- Implement the BI solution and replace the old BI landscape
- Sub-project lead for Sales Bonus Plan: Extend the existing solution and migrate to Azure
- Sub-project lead for Cognos migration: Expand the existing data warehouse based on MS technologies
- Analyze business requirements and create the technical solution
- Expand the relational DWH database
- Develop the ETL processes (SSIS)
- Develop the multidimensional database (OLAP cubes/SSAS)
- Use of MS SQL Server 2016 (SSMS, SSIS, SSAS, SSRS), MS SQL Server PDW, Oracle, Power BI, Delta Lake, Databricks, Synapse
Heinz-Dieter Lühmann
Last position:
Consultant at CH Crypto Group
- Advice on governance and information security topics: BAIT, MaRisk
- Creating governance documents (policies, guidelines)
- Developing emergency manuals
- Based on BSI IT baseline protection standard 200-4 and ISO2700x
Marco Kuhl
Last position:
Owner at Kuhlma IT Solutions
- Self-employed as owner of Kuhlma IT Solutions since July 2015• Consulting on and executing IT consulting projects in client management and email archiving• Supporting and implementing baramundi Management Suite solutions• Performing system updates, packaging applications, and training staff
Holger Grittner
Last position:
IT at Holger Grittner Consulting
Discover over 15,000 top freelancers
Statistics of experts using Windows Server
Aggregated from the professional profiles of matched freelancers.
Experience
27 years (Germany: 24 years)
Position duration
2.8 years (Germany: 5.3 years)
Positions per freelancer
16 (Germany: 17)
Top business areas
Information Technology, Project Management, Operations
Top industries
Information Technology, Professional Services, Banking and Finance
Certification focus areas
Information Technology, Project Management, Quality Assurance
Bachelor's degree or higher
57% (Germany: 68%)
Master's degree or higher
14% (Germany: 39%)
Certifications per freelancer
7 (Germany: 4)
Most common languages
German, English, Spanish
Speak two or more languages
73% (Germany: 96%)
Based on our profile pool as of 30 Aug 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Dusseldorf are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range.
Average rates of experts in Dusseldorf using Windows Server
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
What it is
Windows Server is Microsoft’s server operating system for running business infrastructure on-premises and in hybrid setups. It is used for identity, file sharing, application hosting, virtualization, and remote access. Companies also rely on it to support legacy line-of-business systems that must stay stable.
Common workloads
- Active Directory, Group Policy, DNS, and DHCP
- File, print, and permission management
- Hyper-V virtual machines and storage
- Remote Desktop Services and secure access
- Web and app hosting with IIS
Core ecosystem
Strong specialists work across the Microsoft stack, especially Active Directory, PowerShell, Hyper-V, IIS, and Windows Admin Center. They also know how Windows Server connects with Azure, Entra ID, and Microsoft 365 in hybrid environments. That mix matters when environments span offices, data centers, and cloud services.
When to bring in help
Companies usually bring in freelance expertise for server migrations, patching, domain redesigns, permission cleanup, and hardening. It also helps when a team needs support for a failed update, a slow file server, or a new virtualized workload. In Dusseldorf, this is common for industries that run mixed IT estates and need clear handover in English or German.
What good specialists do
Good Windows Server professionals document every change, check dependencies before they touch production, and reduce risk during upgrades. They understand service accounts, certificates, backup recovery, and logs well enough to find the real cause of a problem. They also keep systems maintainable after the project ends, not just working on the day of handover.
Typical project fit
A company should expect the best results when the scope is clear: domain services, server builds, migration plans, or recurring administration tasks. Windows Server work often sits between infrastructure, security, and application support, so the right specialist coordinates well with all three. That is especially useful when local teams in Dusseldorf need on-site presence for critical changes but can review design and documentation remotely.
Frequently asked questions
Key details about Windows Server, drawn from the questions we get asked most.
Windows Server is used to run the core services that keep a business network working. That includes identity, file sharing, Group Policy, virtual machines, web hosting with IIS, and remote access. It is often the base for internal systems that need tight control and predictable behavior.
Windows Server is usually chosen when a company depends on Microsoft services, Active Directory, or Windows-based business software. Linux is often preferred for other application stacks and scripting styles. The right choice depends on your existing environment, support model, and how much Microsoft integration you need.
A strong Windows Server specialist should be comfortable with Active Directory, PowerShell, DNS, DHCP, Hyper-V, IIS, and backup and restore routines. They should also understand security hardening, patching, and troubleshooting from logs and event data. For hybrid setups, Azure and Entra ID knowledge is a major plus.
Not always, but the work should match the risk. A focused Windows Server task like a file share cleanup may need less depth than a domain migration or a production upgrade. If the change affects authentication, access, or recovery, a more experienced specialist is the safer choice.
Much of Windows Server work can be handled remotely through secure admin access, especially planning, troubleshooting, and documentation. On-site time helps when hardware, network paths, or sensitive change windows are involved. In Dusseldorf, many teams use a mixed setup: remote for design and support, on-site for critical handovers.
A Windows Server migration often includes inventory, dependency checks, backup validation, a migration plan, testing, and a controlled cutover. It may also involve updating Group Policy, service accounts, certificates, and scripts. Good planning matters because hidden dependencies are what usually cause delays.
Look for clear documentation, a structured change plan, and a calm way of explaining trade-offs. A good Windows Server freelancer asks about backups, rollback, access rights, and business impact before touching production. They should be able to show how they reduce risk, not just how they fix symptoms.
Yes. Windows Server remains central in many hybrid environments because it still handles identity, file services, internal apps, and virtualization well. Even when cloud services are added, many companies keep Windows Server for the systems that need strict control or legacy compatibility.
The average hourly rate of freelancers in Dusseldorf, Germany who have used Windows Server in their recent projects is 101 €, which corresponds to a daily rate of about 810 € based on an 8-hour working day.
Of the freelancers in Dusseldorf, Germany who have used Windows Server in their recent projects, 57% hold at least a Bachelor's degree and 14% hold at least a Master's degree.
On average, freelancers in Dusseldorf, Germany who have used Windows Server in their recent projects have 27 years of professional experience, with a single engagement typically lasting around 2.8 years.
The most common languages among freelancers in Dusseldorf, Germany who have used Windows Server in their recent projects are German (100%), English (73%), and Spanish (18%).
The most common industries among freelancers in Dusseldorf, Germany who have used Windows Server in their recent projects are Information Technology (100%), Professional Services (64%), and Banking and Finance (45%).
The most common business areas among freelancers in Dusseldorf, Germany who have used Windows Server in their recent projects are Information Technology (100%), Project Management (82%), and Operations (73%).
Main locations of FRATCH Experts, who have recently used Windows Server
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Berlin 
Hamburg 
Munich 
Cologne 
Frankfurt 
Stuttgart 
Essen Request a free demo
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Philipp Thomaschewski
FRATCH CEO
