# Egon Willighagen

> Dutch researcher

**Wikidata**: [Q20895241](https://www.wikidata.org/wiki/Q20895241)  
**Source**: https://4ort.xyz/entity/egon-willighagen

## Summary
Egon Willighagen is a Dutch researcher specializing in bioinformatics and cheminformatics. He is a key developer of the Chemistry Development Kit, an open-source Java library for computational chemistry. Willighagen's work focuses on open science, the Semantic Web, and creating tools for data analysis in chemistry and biology.

## Biography
- **Born**: 1974-10-27, Arnhem
- **Nationality**: Kingdom of the Netherlands
- **Education**: Doctor of Philosophy, Radboud University (2008); Master of Science, Radboud University (2002)
- **Known for**: Development of the Chemistry Development Kit (CDK)
- **Employer(s)**: Maastricht University, Karolinska Institutet, Uppsala University, University of Cambridge, Wageningen University & Research, University of Cologne
- **Field(s)**: Cheminformatics, bioinformatics, open science, Semantic Web, chemistry

## Contributions
Egon Willighagen is a primary contributor to the Chemistry Development Kit (CDK), an open-source Java library for cheminformatics and bioinformatics. First noted in publications around 2001, the CDK provides researchers and developers with a powerful, free toolkit for working with molecular data, enabling tasks like structure depiction, property calculation, and file format conversion. His work embodies the principles of open science, making sophisticated computational chemistry tools accessible to a global academic community.

Beyond the CDK, Willighagen's research applies Semantic Web technologies to scientific data, aiming to make biological and chemical information more interconnected and machine-readable. He is an active author and serves on the editing staff of the *Journal of Cheminformatics*, contributing to the dissemination of knowledge in his field. His doctoral thesis, "Representation of Molecules and Molecular Systems in Data Analysis and Modeling," laid the groundwork for much of his subsequent research into computational data representation.

## FAQs
### Q: What is Egon Willighagen known for?
A: Egon Willighagen is best known as a key developer of the Chemistry Development Kit (CDK), a widely used open-source software library for cheminformatics and bioinformatics.

### Q: What are his main areas of research?
A: His main research fields include cheminformatics, bioinformatics, open science, and the application of Semantic Web technologies to chemical and biological data.

### Q: Where does Egon Willighagen currently work?
A: According to the provided data, he has been employed at Maastricht University since 2012, holding positions as a postdoctoral researcher and subsequently as a "universitair docent" (assistant professor).

## Why They Matter
Egon Willighagen's significance lies in his sustained commitment to open and accessible science. His work on the Chemistry Development Kit (CDK) has been transformative for the fields of cheminformatics and bioinformatics. By co-creating a free, robust, and open-source library, he helped democratize computational chemistry, allowing researchers worldwide—regardless of their institution's budget—to perform complex molecular analysis. This has lowered barriers to entry and fostered a more collaborative and reproducible scientific ecosystem.

His advocacy for open science and the use of Semantic Web standards addresses a critical challenge in modern research: data interoperability. By developing methods to link disparate chemical and biological datasets, his work helps scientists uncover new connections and accelerate discovery. Without contributors like Willighagen, the tools for computational chemistry would likely be more fragmented, proprietary, and less accessible, slowing the pace of innovation in drug discovery, materials science, and systems biology.

## Notable For
- **Chemistry Development Kit**: A principal developer of the influential open-source Java library for cheminformatics.
- **Blue Obelisk Award**: Received the Blue Obelisk Award in 2007, which recognizes achievements in open data, open source, and open standards in chemistry.
- **Journal of Cheminformatics**: Serves on the editing staff of this key academic journal in his field.
- **Open Science Advocate**: A prominent researcher in the fields of open science and the Semantic Web as applied to chemistry and biology.
- **Award Nomination**: Nominated for the 2025 Excellence in Biocuration Advanced Career Award.

## Body
### Personal and Educational Background
- **Full Name**: Egon Lennert Willighagen
- **Born**: 1974-10-27 in Arnhem, Kingdom of the Netherlands.
- **Citizenship**: Kingdom of the Netherlands.
- **Languages**: Speaks Dutch, English, and German.
- **Education**:
    - **Doctor of Philosophy (PhD)**, Radboud University (December 2001 - April 2, 2008).
        - Thesis: *Representation of Molecules and Molecular Systems in Data Analysis and Modeling*.
        - Doctoral Advisors: Lutgarde Buydens, Peter Murray-Rust.
        - Supporting Doctoral Advisor: Ron Wehrens.
    - **Master of Science (MSc)**, Radboud University (September 1, 1993 - February 25, 2002).

### Career and Affiliations
- **Maastricht University**:
    - Universitair docent (since February 2014).
    - Postdoctoral researcher (January 2012 - January 2014).
    - Affiliated with the Department of Translational Genomics (since September 2024) and the Department of Bioinformatics - BiGCaT (January 2012 - September 2024).
- **Karolinska Institutet**: Employed from January 2011 to December 2011.
- **University of Cambridge**: Employed from October 2010 to December 2010.
- **Uppsala University**: Postdoctoral researcher from October 2008 to September 2010.
- **Wageningen University & Research**: Employed from May 2007 to August 2008.
- **University of Cologne**: Employed from April 2006 to March 2007.

### Research and Professional Activities
- **Fields of Work**: His research spans cheminformatics, bioinformatics, open science, the Semantic Web, and chemistry.
- **Notable Work**: He is a developer of the **Chemistry Development Kit (CDK)**, an open-source Java library for computational chemistry.
- **Awards and Honors**:
    - Recipient of the **Blue Obelisk Award** in 2007.
    - Nominated for the **Excellence in Biocuration Advanced Career Award** for 2025.
- **Professional Memberships**:
    - Member of the Royal Netherlands Chemical Society.
- **Editorial Roles**:
    - Serves on the editing staff for the *Journal of Cheminformatics*.

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## References

1. Representation of Molecules and Molecular Systems in Data Analysis and Modeling
2. [Source](https://chem-bla-ics.linkedchemistry.info/2024/09/07/wikidata-citations.html)
3. From the Blogosphere
4. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0001-7542-0286/employment/47923)
5. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0001-7542-0286/employment/47912)
6. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0001-7542-0286/employment/47911)
7. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0001-7542-0286/employment/120907)
8. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0001-7542-0286/employment/47362)
9. [Source](https://blueobelisk.github.io/awards.html)
10. [Source](https://doi.org/10.26481/dis.20250702aa)
11. International Standard Name Identifier
12. Virtual International Authority File
13. [Brave GNU World - Issue #29. 2001](https://www.gnu.org/brave-gnu-world/issue-29.html)
14. [Source](https://www.biocuration.org/community/biocuration-career-awards/excellence-in-biocuration-advanced-career-award-2025/)
15. Blogroll: Coding chemistry
16. [ORCID Public Data File 2020](https://pub.orcid.org/v3.0_rc1/0000-0001-7542-0286/external-identifiers/480533)
17. [Egon L Willighagen's research works | Maastricht University, Maastricht (UM) and other places](https://www.researchgate.net/scientific-contributions/Egon-L-Willighagen-39655307)