Castor is created and maintained by an international team of Medical Research and IT enthusiasts – click on a profile to learn more about us.

Derk Arts
Founder, CEO

Epidemiologist and founder of Castor

Sebastiaan Knijnenburg

Medical informatics graduate who oversees all the technological development of Castor

Rob Konterman

Ex-Consultant of The Boston Consulting Group (BCG) responsible for accelerating growth

Lieke Helsper
Customer Success Manager

MSc in Science & Innovation management, keeps our customers happy

International Sales

Bart gives Castor’s accounts abroad advice on epidemiological statistical questions

Operations Manager

Operations Manager with a background in translation and project management

Frouke Karel
Product Owner Castor SMS

Enthusiastic health scientist who makes sure that Castor SMS meets all the user requirements

Sabrina Edinger
Junior Full Stack Developer

Junior full stack developer with a background in Medical Anthropology


Developer specializing in PHP, MySQL, JavaScript, C, C++ and Java

R&D Manager

Student Medical Informatics, develops tools to help customers make the best out of Castor


Gaurav is an expert on frontend technologies specializing in Sencha ExtJS


Tanu has experience of working in startups as well as large corporations


Co-founder and advisor since Castor’s inception

Quality Assurance

Makes sure all Castor releases are top-notch!

Melissa Mark
Growth Intern

Environmental Sciences student. Responsible for marketing, sales, and growing the company globally

team member Arlene
Growth Intern

Health Sciences student. Responsible for growing Castor’s international presence

Arianna Skirzynska
Product Management Intern

Nanotechnology Engineering student. Responsible for managing sprints and product development