Data Warehouse Consultants in Germany
in minutes from 15,000 CVs with the power of AI.Need help with DWH design, ETL/ELT pipelines, dimensional modelling, or cloud warehouses such as Snowflake, BigQuery, Synapse, or Azure Data Factory? Get fast, precise matching with vetted, available freelancers.
Meet FRATCH Data Warehouse Consultants in Germany
Asım Y.
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
Kai P.
Last position:
Oracle Project Management and DBA at Scope Solutions AG
PROFILE Senior Oracle specialist, consultant and DBA with many years of experience in planning, architecture, installation, migration, operations, performance tuning and troubleshooting of large Oracle database environments. Focus on Oracle Database 19c and enterprise architectures with RAC, Active Data Guard, Golden Gate, Exadata, RMAN and CDB/PDB. Experience in heterogeneous enterprise environments on Linux, AIX, Solaris, HP-UX and Windows, as well as in cloud and migration projects. Over many years, worked as a technical consultant, DBA, architect and project manager for banks, insurers, energy providers, public institutions, industry, automotive and aviation. Combining technical Oracle expertise with operations concepts, migration, project planning, documentation and customer consulting.
ORACLE FOCUS AREAS
- Oracle Database 19c – installation, upgrade, patch/RU management, operations and troubleshooting
- Oracle Database 21c / 23ai / 26ai – knowledge of current Oracle release lines
- Oracle RAC, Active Data Guard, Data Guard, Oracle GoldenGate
- CDB / PDB, multitenant architectures and enterprise database operations
- Oracle Exadata and highly available database environments
- RMAN – backup, restore, recovery, migration and disaster recovery scenarios
- Data Pump (EXPDP / IMPDP), Transportable Tablespaces (TTS) and database-based migrations
- Performance analysis, SQL / PL/SQL, tuning, troubleshooting and capacity planning
- Oracle Enterprise Manager / monitoring and technical operational support
- Oracle Security: Wallet, TDE, Database Vault, VPD / RLS
- Oracle DWH / BI: OBIEE, ODI, OWB and Discoverer
- Oracle Applications / E-Business Suite and Oracle-based application environments
CURRENT PROJECTS
Scope Solutions AG, Basel / CH | 08/2023 – ongoing Oracle Project Management and DBA
- Installation, maintenance and regular upgrades of Oracle database systems with a focus on Oracle 19c.
- Patch and release management including OPatch and Release Updates; operations on RHEL 8.x, SLES 15.x and Windows.
- DBA support for customers in DACH and Europe and support of production, load test and other CDB/PDB environments.
- Technical operating processes and documentation via Confluence; support and service requests via My Oracle Support / Metalink.
Federal Employment Agency, Nuremberg | 04/2022 – 10/2023 Oracle Operations Support / DBA
- Operations and regular upgrades of Oracle-19c database systems on SLES 15.x.
- DBA for around 2,100 PDBs on RAC and Exadata in production, integration, load test and other environments.
- Configuration management via ARS Remedy; workflows and technical documentation via Jira and Confluence.
- Operations support and processing of service requests via My Oracle Support / Metalink.
Federal Statistical Office, Wiesbaden | 09/2021 – 03/2022 Oracle Operations and Architecture – 2022 Survey
- Merging data into a central Oracle-19c database system.
- Design of import/export procedures for the central data structure.
- KPI and performance architecture for analyses.
- Training employees in Oracle performance and DBA topics.
E.ON Digital Technology, Landshut / KKI | 03/2019 – 12/2021 Oracle Operations, Architecture and DBA
- Patch concepts, technical documentation, installation, database administration and operations of Oracle 12c/19c.
- AIX 7.x, LPAR administration including VIO server and software distribution with NIM.
- Performance monitoring and monitoring.
- Backup and restore with TSM / IBM Spectrum Protect and Oracle RMAN.
- Installation of Enterprise Manager 13c with WebLogic Server 12.1x; employee training.
KaPe Munich – various end customers in DACH / Europe | ongoing / various projects Oracle DBA, architecture, migration, DWH consulting and project management
- Many years of consulting and operational DBA work in various Oracle architectures.
- DWH/CRM platforms: planning, analysis, performance and tuning, as well as business analysis.
- RAC, Data Guard, Transportable Tablespaces, RMAN and Oracle 11g/12c in enterprise environments.
- Customer projects including Burda, Deka, E.ON, Otto Group and Augsburger Allgemeine.
AXA, Germany / Europe | 09/2018 – 02/2019 Oracle DB Operations and Migration – Cloud Architectures
- Planning, methodology and execution of Oracle database migrations to IBM Private Cloud / Spectrum and AWS Public Cloud.
- Creation of Oracle databases in the cloud with SLES and Terraform templates.
- Technical architecture work and cloud KPIs.
RWE / SÜWAG / Syna, Germany | 07/2016 – 09/2018 Oracle DB Migrations 11g/12c and Project Management
- Design, planning and execution of Oracle database migrations 11g → 12c with platform and architecture changes.
- Windows Server 2012/2016 and setup and migration of Enterprise Manager/WebLogic-based monitoring environments.
- Use of Data Guard, TTS, EXPDP/IMPDP and RMAN based on analysis of application requirements.
- Performance and tuning for Oracle 11g/12c.
MTU Aero Engines, Munich | 01/2016 – 03/2017 Oracle DBA / Requirements Engineer
- Operations and development of Oracle 11g/12c databases and application workflows.
- Interfaces to SAP via BAPI.
- Design and management of APPS modules with Visual Basic / Visual Studio and PL/SQL; version control with SVN.
UBIS (HVB), Munich | 04/2012 – 08/2015 Oracle Operations, Architecture, DBA and Project Management
- Oracle-based operations and migration of MUREX and Sophis trading platforms.
- Oracle Security, Wallet, Tablespaces, RAC, Data Guard, Database Vault, GoldenGate and DWH.
- Project management for Oracle DWH migrations and release changes from 10g to 11gR2.
- Migration OWB 11gR2 → ODI 12c and introduction of Oracle Database 12c.
- Platforms: Red Hat, AIX and Solaris.
WWK Deutschland a.G., Munich | 09/2010 – 03/2012 Oracle DB and HP-UX → Linux Migration
- Architecture, planning, operations concept and migration of 104 databases from an HP-UX cluster to Red Hat Linux.
- Single Instance with Veritas Cluster and 2-node RAC 11.2.0.2; four Data Guard databases.
- Project management for OWB/DWH migrations (>1 TB), including tuning, PL/SQL, mappings and metadata.
Allianz Deutschland, ACAS Stuttgart | 03/2010 – 09/2010 Technical DWH Project Manager
- DWH project for processing European ETL data sources.
- Business analysis and requirements management for automated loading processes.
- OWB, PL/SQL, SQL*Loader, Oracle Advanced Security / TDE, Oracle BI and Database Vault.
NETMA, Munich-Taufkirchen | 08/2007 – 02/2010 Oracle Specialist and DBA for Oracle Applications 11i
- Operations of Oracle 9i/10g and Oracle Applications 11.5.10.
- Design and development of APPS modules with PL/SQL and SVN.
- Oracle RAC, Enterprise Manager, Oracle Application Server and migration tests.
- Platforms: AIX, SLES, Windows and HP-UX.
BT Germany, Munich | 11/2007 – 04/2008 Oracle DB Migration
- Migration from Oracle 8i to 10gR2 in a Solaris cluster environment.
- Preparing offers, project planning and process planning.
Itellium (KQ), Nuremberg | 02/2007 – 08/2007 Oracle DWH Specialist
- Design and analysis of a DWH focusing on master data and logistics.
- Oracle Designer, OWB, Oracle Database, ETL, PL/SQL and External Tables; data volumes up to approx. 5 TB.
Oracle Deutschland GmbH, Munich | 10/2006 – 02/2007 and further assignments Oracle Specialist / Consultant – Data Migration and DWH
- Consulting for customers such as Volkswagen, GE Money Bank, WeKa, KSB, Swisscom and British Telecom.
- Migration Discoverer EUL4 → EUL5i, database optimization, Data Guard and web/database analysis.
- Performance and tuning on Solaris and Linux.
HaSpa, Hamburg | 07/2006 – 10/2006 Oracle Specialist / Consultant – Data Migration and DWH
- Setup of an Oracle-10gR2 environment for banking applications.
- Data transfer from DB2 / OS390, architecture, sizing, tuning and performance.
- Data preparation and integration with OWB.
AUDI, Ingolstadt | 02/2005 – 06/2006 Oracle Consultant and DBA
- Operations, installation and maintenance of Oracle 9i/10g and IAS 10g.
- RMAN, Oracle RLS, Oracle HTMLDB, Veritas Cluster, Solaris and AIX / HACMP.
- Database cloning and migration 9i → 10g; approx. 200 systems up to 4.5 TB.
Photocolor, Kreuzlingen / CH | 11/2003 – 01/2005 Project Manager / Oracle
- Implementation, configuration, technical support and acceptance of an Oracle ERP/CRM solution.
- Oracle Applications, Oracle 9i, Solaris, HP-UX, OWB and Mercury TestDirector.
- Project scope approx. 2 TB; reporting to management.
ZPD NRW, Duisburg | 05/2003 – 10/2003 Oracle Consultant
- Consulting, PL/SQL training and project planning for a nationwide Oracle Forms integration.
- Oracle on HP Superdome / HP-UX; data volume 1.2 → 2.5 TB, sizing up to 5 TB.
Messe München GmbH | 11/2002 – 05/2003 Project Manager / Oracle
- MIS/DWH solution with OWB, Discoverer, Oracle 11i / 9i and RAC.
- Architecture, design, integration, troubleshooting and consulting for data volumes of 1.5–2 TB.
Aria SA Integration, Geneva / CH | 09/2002 – 11/2002 Oracle DBA and Consultant
- Oracle 8.1.7.4 / 9i; merging the Stuttgart and Geneva databases via replication.
Olga M.
Last position:
Migration of the existing DWH from MS SQL Server to Azure Databricks at Oraylis GmbH
- Led the migration of the existing DWH, including HR data, application processes, project business and time tracking, from an MS SQL Server environment to Azure Databricks
- Refactored existing data models and ETL processes and extended them with new objects and functionalities
- Used Azure Databricks (Unity Catalog, Notebooks, Spark SQL, Databricks Dataflows) and Power BI
- Technologies: MS SQL Server 2019 (SSMS, SSIS), Power BI, Delta Lake, Azure Databricks
Peter H.
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
Matthias L.
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 B.
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 W.
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 K.
Last position:
Expert in Data Warehousing and Business Intelligence at Freelance Consultant
Discover over 15,000 top freelancers
Data Warehouse Consultants statistics
Aggregated from the professional profiles of matched freelancers.
Experience
26 years
Position duration
3.8 years
Positions per freelancer
16
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
86%
Master's degree or higher
71%
Doctorate
14%
Certifications per freelancer
1
Most common languages
German, English, Spanish
Speak two or more languages
88%
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this role in Germany are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging 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 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Data Warehouse Consultants experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (100%)
- Banking and Finance (88%)
- Insurance (63%)
- Telecommunication (50%)
- Healthcare (38%)
- Manufacturing (38%)
- Pharmaceutical (38%)
- Professional Services (38%)
Please note that freelancers can work across multiple industries, so percentages overlap.
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 878 € based on an 8-hour working day.
Of the freelancers working as Data Warehouse Consultants in Germany, 86% hold at least a Bachelor's degree, 71% hold at least a Master's degree, and 14% 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 (88%), 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 (75%).
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
Get in touch with the FRATCH team and we will get back to you within 4 hours.
Would you rather directly get in touch?
We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
