Data Warehouse Consultants in Germany
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Meet FRATCH Data Warehouse Consultants in Germany
Peter Herrmann
Last position:
Consultant Financial Data Warehouse Migration Interfaces Reporting at Large bank / central institution
- New connection of the product interfaces of the Financial Data Warehouse (FDW) directly to the Abacus 360 native interfaces
- IT environment: PC, client-server, Citrix remote client, Oracle DB
- Mapping of FDW outbound to Abacus 360 Native
- Analysis of requirements documents, business concepts, and existing interface rules
- Definition of new FDW rules for outbound to Abacus 360
- Adjustment of test scripts for the new interfaces
- Execution of tests to ensure correct data delivery and processing
Kai Pankatz
Last position:
Oracle Project Management and DBA at Scope Solutions AG
- Installation, maintenance and regular upgrade of the DB systems with 19x
- Use of OPatch and RU 19.27 on RHEL 8x, SLES 15.x and Windows
- DBA for DACH and European customers in production and last test environments (e.g. Konrad Adenauer) as well as others in CDB
- Processes via Confluence
- Support in operations for customers SR via Metalink
Olga Methner
Last position:
Telefónica Deutschland Holding AG
- Implemented the BI solution and replaced the old BI landscape
- Led the “Sales Bonus Plan” subproject: expanded the existing solution and migrated to Azure (Databricks)
- Led the “Cognos Migration” subproject: expanded existing data warehouses based on MS technologies (source systems: Oracle), analyzed business requirements and designed the technical solution
- Expanded the relational DWH database
- Developed ETL processes using SSIS
- Developed the multidimensional database (OLAP Cubes/SSAS)
Asım Yurduseven
Last position:
Freelance BI/DWH/ETL Specialist at Akbank
- Setting architectural standards for Informatica Power Center development teams
- Maintenance-performance-health for DWH (Exadata) environments
- Qlik Sense / BO reports architectural standards
- Implementing best practices in ETL tasks
- Documentation ETL standards on Confluence
- Dynamic Data Masking rules for GDPR/KVKK regulations by using Informatica DDM tool
- DWH Data model Power Designer
- Upgrade Qlik Sense versions
- Merge all Informatica server's repository databases on one Oracle DB
Matthias Löchner
Last position:
IT service provider
- Analysis of the data model for a DWH project with the Federal Network Agency
- Analysis of the data model and performance in Oracle
- Performance optimization in Oracle
- Adaptation of the schema model and expansion/optimization of dossiers
- Modeling of an internal finance DWH and development of reports for internal controlling
- Modeling of the stage, core, business, and data mart layers
- Definition of requirements for the ETL colleagues
- Replacement of the existing reporting tool Cubeware with PowerBI
- Building the semantic layer in PowerBI and development of reports
Peter Brungs
Last position:
Data Warehouse Consultant (Development and Analysis) at Atruvia AG
- Developed and enhanced ETL loading jobs with IBM DataStage and optimized SQL in an IBM DB2 environment as part of the Agree21 data migration
- Analyzed data quality and developed test procedures
- Created PowerShell scripts and documented GIT deployment processes
- Technologies: RedHat Linux, IBM DB2 with DBVisualizer, IBM InfoSphere DataStage 11.7, JIRA, TortoiseGIT, TortoiseSVN, PowerShell scripts
Juri Wolfenhaut
Last position:
Telefónica / O2
- Development of the NBO/NBA engine intended to support agents during customer interaction
- Related ETL processes
- Back-end development to support related web front-ends
Michael Köhler
Last position:
Expert in Data Warehousing and Business Intelligence at Freelance Consultant
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Data Warehouse Consultants statistics
Aggregated from the professional profiles of matched freelancers.
Experience
26 years
Position duration
3.8 years
Positions per freelancer
15
Top business areas
Business Intelligence, Information Technology, Product Development
Top industries
Information Technology, Banking and Finance, Insurance
Certification focus areas
Project Management, Information Technology, Accounting
Bachelor's degree or higher
83%
Master's degree or higher
67%
Doctorate
17%
Certifications per freelancer
1
Most common languages
German, English, Spanish
Speak two or more languages
88%
Based on our profile pool as of 30 Aug 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this role in Germany 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 for Data Warehouse Consultants in Germany
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 role
What they deliver
A Data Warehouse Consultant turns scattered source systems into a warehouse that teams can trust for reporting, analysis, and planning. They define the target model, align business terms with technical fields, and make sure data flows are stable and traceable.
- Warehouse architecture and data model design
- ETL and ELT flow setup
- Dimensional modelling and star schemas
- Data quality checks and reconciliation rules
- BI-ready layers for reporting teams
- Documentation for handover and support
Core skills
Strong consultants work across SQL, data modelling, and pipeline logic. They understand how to move data from ERP, CRM, web, finance, and production systems into a structure that supports fast queries and clean dashboards.
- SQL and performance tuning
- ETL tools and orchestration
- Cloud platforms and warehouse services
- Data governance and lineage
- BI requirements and stakeholder interviews
Tools and stacks
A Data Warehouse Consultant may work in classic on-premise environments or modern cloud setups. Common stacks include Microsoft SQL Server, Azure Synapse, Azure Data Factory, Snowflake, BigQuery, dbt, Informatica, Talend, and SAP-based landscapes such as BW or S/4HANA-connected reporting.
In Germany, this often means close work with manufacturing, automotive, retail, finance, or industrial clients that need reliable reporting across multiple systems and languages.
When to bring one in
Companies hire a freelancer when the warehouse needs specialist input for a new build, a migration, or a redesign. It also makes sense when internal teams know the source systems but lack deep experience in modelling, pipeline structure, or BI-ready data layers.
- New warehouse build or modernization
- Migration from legacy reporting to cloud analytics
- Poor data quality or inconsistent KPIs
- Slow SQL queries and unstable loads
- Temporary need for senior DWH expertise
What strong consultants do well
The best Data Warehouse Consultants do more than write SQL. They ask the right questions, challenge unclear KPI definitions, and keep both business users and engineers aligned.
They document decisions clearly, think about maintainability, and know where to simplify. A strong DWH Consultant leaves behind a structure that is easy to extend, test, and support.
Freelance collaboration
Freelance data warehouse work is often project-based and suits focused delivery. Remote work is common for modelling, coding, and review, while workshops or cutover phases may benefit from on-site time in Germany.
Companies should look for someone who can join quickly, understand source-to-target logic, and work well with data engineers, BI developers, and business analysts from day one.
Frequently asked questions
Need clarity? These are the questions we hear most often about Data Warehouse Consultants.
A Data Warehouse Consultant designs or improves the structure that sits between source systems and reporting tools. They define data models, build ETL or ELT logic, and make sure business metrics are loaded consistently. In practice, that means turning raw operational data into a warehouse that analysts can actually use.
A Data Warehouse Consultant is a good fit when the need is project-based, urgent, or highly specialised. That includes migrations, model redesigns, performance fixes, or a short gap before a permanent team is in place. Freelancers are also useful when the internal team needs senior guidance without a long hiring cycle.
A strong Data Warehouse Consultant needs solid SQL, data modelling skills, and experience with ETL or ELT pipelines. They should also understand data quality, orchestration, and how reporting teams consume warehouse data. Good communication matters just as much, because they need to align business definitions with technical design.
A Data Warehouse Consultant often bridges both worlds. Compared with a data engineer, the focus is more on warehouse design, modelling, and analytical structure; compared with a BI developer, the scope is deeper in the data layer and source-to-target logic. Many projects overlap, which is why titles such as DWH Consultant or Data Warehouse Engineer are often used for similar work.
A Data Warehouse Consultant may work with Microsoft SQL Server, Azure Synapse, Azure Data Factory, Snowflake, BigQuery, dbt, Informatica, Talend, or SAP-related setups. The exact stack depends on the client landscape and whether the target is on-premise, cloud, or hybrid. What matters most is that they can adapt the design to the chosen platform and keep it maintainable.
A Data Warehouse Consultant can usually do most work remotely, especially modelling, SQL development, documentation, and review sessions. On-site time helps during workshops, stakeholder alignment, and go-live phases where fast decisions are needed. In Germany, many clients prefer a mix of remote delivery and selected on-site days.
A good Data Warehouse Consultant explains design choices clearly and asks sharp questions about KPIs, source systems, and data ownership. Look for concrete examples of warehouse redesigns, migration work, and handling bad source data without breaking reporting. Strong candidates also show how they test loads, document logic, and support handover.
A DWH Consultant should usually start with a clear assessment of the current landscape, a target model, and a migration or delivery plan. From there, ask for source-to-target mapping, pipeline logic, validation rules, and documentation that your team can maintain. If the project is in Germany, it can also help to clarify language needs for workshops and user acceptance sessions early.
The average hourly rate for Data Warehouse Consultants in Germany is 110 €, which corresponds to a daily rate of about 879 € based on an 8-hour working day.
Of the freelancers working as Data Warehouse Consultants in Germany, 83% hold at least a Bachelor's degree, 67% hold at least a Master's degree, and 17% hold a doctorate.
On average, freelancers working as Data Warehouse Consultants in Germany have 26 years of professional experience, with a single engagement typically lasting around 3.8 years.
The most common languages among freelancers working as Data Warehouse Consultants in Germany are German (100%), English (88%), and Spanish (25%).
The most common industries among freelancers working as Data Warehouse Consultants in Germany are Information Technology (100%), Banking and Finance (75%), and Insurance (63%).
The most common business areas among freelancers working as Data Warehouse Consultants in Germany are Business Intelligence (100%), Information Technology (100%), and Product Development (63%).
FRATCH Data Warehouse Consultants main locations
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 Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
