Our Team

Meet Our Team


Remko van Leeuwen


Remko van Leeuwen has more than 25 years of research experience under his belt, both in the industry as well as in the academic arena.

He has a medical background, and been trained as a clinical epidemiologist and has extensive experienced in clinical infectious disease management. He has obtained a PhD in clinical HIV studies.

After completing his PhD, he decided on a career switch and he terminated his hospital based clinical activities. Over the last 2 decades, he has various positions in drug development and clinical trial conduct. He has designed and executed numerous clinical trials and pre-clinical development programs.

He has been team leader of large multi-national successful research projects. He carries in depth knowledge of product development, including regulatory requirements, medical affairs, biostatistics and data analysis. He has followed the NIABA Masterclass of Biobusiness 2009/2010. In 2011 he founded Madam Therapeutics.

Leonie de Best


Leonie de Best has a background in Analytical Chemistry and has 19 years of extensive management experience in biotech/life science industry, of which 5 years at senior executive level (COO).

Leonie has a broad experience in the management of business processes in the field of (in-vitro) diagnostic assay and pharmaceutical product development from research stage until European and US market registrations.

With this experience she supports life science organizations like Madam Therapeutic to efficiently achieve their ambitious goals, bringing valuable and high quality health care products and services to patients.

Diederik Engbersen

Senior VP Business Development

Diederik Engbertsen holds a MSc degree in Medicine from Leiden University, The Netherlands. After obtaining his degree, Diederik worked for over 30 years in the diagnostic industry in several managerial and international positions.

He has a track record of introductions of innovative diagnostic assays both in large companies as well as for start-ups. Diederik’s prime interest is bringing products to markets that address unmet needs.

John Speksnijder

VP Business Development

John (1968) holds a MSc degree in Biology from Utrecht University, The Netherlands.

After his degree, John worked for over 25 years in the pharmaceutical industry and life sciences in several staff and managerial positions at national and international level.

John has an extensive track record in interim and consultancy positions in big pharma and life sciences within marketing, sales and business development.

His prime interest is to provide entrepreneurial support to start-ups and scale-ups, putting in place commercialization strategies, business development, customers’ behaviors, pricing techniques and marketing communications.