JOCHEN RIESEBERG
SQL Server & Access specialist · freelance since 1994
I bring database landscapes that have grown out of control back under control.
Grown over the years, built by changing hands, barely documented – and business-critical all the same: that's how many database landscapes look by the time I come in.
My job is rarely a complete rebuild. Most of the time it's about bringing light into the system: What does it actually do? What of it is still needed? And how can it be documented and stabilised so your team can keep working safely even without me?
Since 1994 I have supported companies with everything around Microsoft SQL Server, SSIS/SSRS and Access/VBA – from migration and performance tuning to new development, complemented by ETL/DWH and Power BI.
Modern tools are part of the craft for me: I use AI-assisted tools in everyday project work – for faster analysis, clean documentation and less routine effort. Certified in Anthropic AI Fluency, Claude Code and Claude Cowork.
EXAMPLE Projects
Dr. Glinz COVIS GmbH, Düsseldorf · 2009–2020 (approx. 11 years) Responsible for administering a production SQL Server landscape of around 40 instances and more than 400 databases in an ISO 27001 environment; migrations across several SQL Server generations, failover clustering, backup/recovery strategies, performance tuning and full documentation of the topology. MS SQL Server · SSIS · SSRS · SSAS · DTS · Replication
Landeskriminalamt Thüringen (Thuringia State Criminal Police Office), Erfurt · 2024/2025 Consolidation of heterogeneous sources (REST/API, PostgreSQL) into a SQL Server structure via SSIS; maintenance-free ETL processes even with changing source structures, plus an Access-based maintenance tool that needs no SSMS access. MS SQL Server · SSIS · REST/API · PostgreSQL · MS Access
Cedo Ltd., Telford (UK) · 2023/2024 Extension of a data warehouse, data analysis and the preparation and rebuilding of data views for Power BI; optimisation of interfaces to third-party systems and data cleansing to user requirements. Visual Studio · SSAS · SSIS · SSRS · Power BI · MS Access · Excel
Mi-Hub Polska Sp. z o.o. · 2023/2024 SQL Server administration and improvement of the existing management information system (MIS); adapting and rebuilding data queries. Visual Studio · SSAS · SSIS · SSRS · SSMS
Telefónica Germany GmbH · 2022/2023 Backend support, administration and development of automatically generated work lists supporting the Telefónica network rollout. Visual Studio · SSIS · SSRS · SSAS · MS Access · Excel
How I work
Rarely is a complete rebuild the answer. Usually, it's about making an existing database landscape understandable, stable, and manageable again – in four steps:
Step 1 - Analyze
I get a clear picture: What does the system really do, what dependencies exist, and what is actually still needed?
Step 3 - Stabilize
Performance, security and maintainability are brought to a reliable level: tuning, backup/recovery, hardening and the elimination of the biggest risks.
Step 2 - Documentation
Topology, interfaces and scattered knowledge are made visible – so that no single head hovers over the system any longer.
Step 4 - Handing over
The end result is a solution that allows your team to continue working independently – without relying on external specialist knowledge.
CUSTOMERS
Selection of the most important customers since 1994
Robert Bosch GmbH, Stuttgart
RWE Energy
ENVICOMP Systemlogistik GmbH & Co. KG
ISS Deutschland GmbH
Folkwang Hochschule Essen
Landesspracheninstitut NRW
PROENERGY Contracting GmbH & Co. KG
CEDO Folien und Haushaltsprodukte GmbH
ABOUT ME
resume
I have been working as a freelance database expert for over 30 years.
My specialism lies in Microsoft SQL Server across all versions –
from design and development through to administration
and performance optimisation and migration.
During this time, I have supported companies across a wide range of sectors
and sizes: from medium-sized manufacturing firms
to international corporations such as Bosch and Telefónica, right through to
public sector organisations.
What drives me: making complex data problems tangible
and delivering solutions that work in the long term.
Outside of work, I am active in CrossFit and competitive shooting –
there, too, I value accuracy and precision.
I am a member of the Lions Club Mülheim-Ruhr Leinpfad.
