Data strategy & architecture
I help organisations decide where they want to go with data and what is needed to get there. Together we turn priorities, ownership and architecture into a clear and realistic direction.
Data Strategy · Process Improvement · Data Platforms
Better decisions start with better data and better processes.
Harrewijn Data helps organisations work smarter with data. Clearer decisions, more efficient processes and solutions the organisation can manage itself.
Focus
Strategy, governance, process improvement & delivery
Experience with organisations including
Services
From organisational challenge to a solution that works.
Data quality & governance
Reliable data starts with clear agreements. I help define ownership, standards and controls so people know which data they can trust and who is responsible for what.
Process improvement & decision support
Many processes still rely on manual work, disconnected files or repeated checks. I map the process and identify where data, automation or AI can make the work simpler, faster and more reliable.
Data platforms
When a new or improved data platform is needed, I can also lead the implementation. The technology supports the way the organisation wants to work, rather than becoming the goal in itself.
Selected experience
Advice that also works in practice.
I help organisations choose a direction and make it work — from stakeholder alignment and process improvement to governance and implementation.
90%
shorter process duration
At Vecozo, an AI solution reduced the duration of a labour-intensive process by 90%.
8
public-sector partners aligned
Requirements from seven municipalities and the Province of Overijssel were harmonised into one shared functional design and technical direction.
10+
source systems brought together
Integrated more than ten source systems into one governed data environment to support consistent management information.
4 TB
production data platform scale
Designed and built a Microsoft Fabric platform processing approximately 4 TB of healthcare data.
Healthcare
A governed Fabric platform for reliable operational insight
Designed and implemented a Microsoft Fabric data platform with dimensional modelling, row-level security, automated data quality checks, scorecard reporting and end-user enablement.
Result
Four reporting domains — Care, HR, Finance and Quality — brought onto one governed platform, including management reporting based on the Balanced Scorecard.
Public services
One data foundation across seven government partners
Led the redesign of a centralised Fabric data warehouse, aligning platform choices with public-sector standards, governance requirements and a roadmap toward Purview.
Result
Requirements from multiple autonomous public-sector partners were harmonised into one functional design and one technical direction.
Industry
From source systems to governed reporting in Fabric
Delivered an end-to-end data warehouse and Power BI implementation with metadata-driven pipelines, medallion architecture, governance and operational monitoring.
Result
Multiple business domains and reports were consolidated onto one central reusable data model with live data-quality monitoring.
How I work
Understand the organisation first. Then improve the solution.
01
Understand
Map the business question, current process, stakeholders, pain points and constraints before choosing a solution.
02
Align
Turn different interests and requirements into one shared direction, clear priorities and workable design principles.
03
Improve
Redesign the process and supporting data solution in short iterations, with visible outcomes and measurable progress.
04
Embed
Transfer knowledge, document ownership and support adoption so the new way of working lasts after the project.
Consultant & Business Analyst
Jonan Harrewijn
Senior Data Architect and Business Analyst focused on better decisions, better processes and practical change.
My work usually starts with people and processes, not technology. I bring different interests together, make complex questions concrete and help organisations arrive at a practical way forward. Because I also understand the technical delivery, the advice stays realistic and implementable.
Experience across business analysis, process improvement, stakeholder management, data strategy, governance, Microsoft Fabric and Power BI.
Technical expertise
Platforms & tools
Data & architecture
Certifications
Have a data challenge?
Let’s improve the way your organisation works with data.
Whether the challenge is inefficient processes, unclear ownership, fragmented reporting or a platform that no longer fits the organisation, I can help structure the problem, align the people involved and turn it into a workable next step.
Start a conversation