Derk Arts, PhD, MD

Founder, CEO

Epidemiologist and founder of Castor. Derk left his medical career in favor of being full time CEO at ... read more

Rob Konterman, MSc


Ex-Consultant of The Boston Consulting Group (BCG) responsible for accelerating growth. To ensure further acceleration of the growth of ... read more

Sebastiaan Knijnenburg, PhD


Medical informatician overseeing all things technical at Castor. Joined Castor as Engineer #1 after his PhD in Medical ... read more

Lieke Helsper, MSc

People & Operations Manager

MSc in Science & Innovation management.

Martijn Kersloot, BSc

PhD Researcher

Focuses on creating a scalable solution that will aid in the standardization of medical research data. Martijn is ... read more

Alex Tirtan


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

Sachin Yadav

Quality Assurance

Makes sure all Castor releases are top-notch!

Tanu Jain, MSc


Tanu is a Full Stack web developer at Castor. Her role is to develop cool features in CastorSMS. ... read more

Gaurav Jain, B.Tech


Gaurav is an expert on frontend technologies specializing in Sencha ExtJS. Gaurav works on developing different features and ... read more

Sabrina Edinger, MSc

Full Stack Developer

Full stack developer with a background in Medical Anthropology.

Frouke Karel, MSc

Product Owner Castor SMS

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

André Johnson


André is a developer from Finland who joined Castor.

Denis Rakov

Senior Software Engineer

Patrick Martin, BSc

Medior Software Engineer

Patrick is a software engineer specialized in web development.

Sigrid van Rooijen, MSc

Business Development Representative

International oriented and passionate about improving research quality.

Valerie Franke, LLM

Legal Counsel & Compliance Officer

Legal Counsel & Data Protection Officer, responsible for Privacy & Data Protection Compliance at Castor EDC

Kim Rosseneu

Office Manager | Executive Assistant

Keeps things going at Castor!

Alexa Fuentes Valdez, BA

Marketing and Growth Intern

Psychology student from the University of Waterloo. Responsible for growing and maintaining Castor’s online presence.

Rowan Milwid

Head of Product

Ensures maximum value for our customers through innovative and user focused product management.

Elena Kochova, MD

Customer Success Specialist

Supports our customers and translates customer needs into viable solutions.

Ben Driesen, MSc

Lead Quality Assurance Engineer

Ensures that users get a high quality product without bugs.

Chris Pattison, M.A.

Lead Product Designer

SaaS design expert bringing usability and design thinking to Castor.

Roxana Cristian, MSc.

Senior Software Engineer

Passionate about technology and an advocate for comprehensible and maintainable code.

Jolien Lam, MSc

Support Intern

Jolien has a MSc degree in Healthcare Management and is currently performing her Master's thesis in Medical Informatics ... read more

Hatef Rad, MSc

Medior Developer

A software engineer with a focus in web development.

Taru Saares, M.A.

People & Operations Specialist

Passionate about people, eager to help both future and current Castorians!

Bryan Mailloux, BASc

Software Developer Intern

Squashing bugs and adding new features to Castor EDC.

Erik de Monchy

Head of Sales

Erik joined to build out Castors global sales organisation. He is a firm believer in creating an efficient ... read more

Tonya Khodzhaeva, MA

At Castor Tonya works closely with customers and helps them to get the most out of the platform ... read more

Himanshu Pant, MBA

Marketing Manager

Enthusiastic marketer with a goal to connect users to relevant products or services that solves or simplifies their ... read more

Tameika Elliott, BA

UX Design Intern

Design Intern from the University of Waterloo. Enjoys transforming complex ideas into simple and elegant solutions.

Connor Huxman, BSc

Product Management Intern

Connor is a student at the University of Waterloo majoring in Biomedical Engineering and minoring in Visual Art. ... read more

Viktoria Plackoska BSc

Quality Assurance Intern

Biology student at the University of Waterloo, working in QA to keep products bug-free.

Ferdinand Lie

Finance Manager

Passionate about Finance and Scale-ups, making sure all the numbers make sense.

Bart Torensma, PhD(c), MSc

International Sales & Clinical Epidemiologist

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

Rob de Vries, PhD, MD


Co-founder and advisor since Castor’s inception.

Pauline Beelen, MSc

Senior Recruiter

Specialized recruiter helping Castor to select the right people for the job.