Our team
Our team consists of a highly experienced group of people who strive to the utmost on delivering better and more balanced treatment outcomes for each individual cancer patient.
Paul van den Biggelaar, CEO and Co-founder
Paul has studied the potential of thermotherapy for over a decade. He has more than 30 years of experience in High Tech, of which he spent 15 years as an Executive. Before co-founding and leading Sensius in 2015, Paul had co-founded and led NRGLed and HEARConcepts. He is also an Entrepreneur at ThinkThrough, a company that invests in high tech ideas and concepts to turn them into products and companies. Prior to that Paul was an Executive at Nucletron where he was Business Unit Director and later responsible for all product development. Paul has a MSc degree in Electrical Engineering from Eindhoven University of Technology.
Stan van Oppen, CFO
Stan joined Sensius in 2021 following 15 years’ experience in finance and control as well as in new ventures, strategic decision-making supporting start-ups and new businesses. Stan is a former executive of Royal Dutch Shell where he spent more than 10 years at various positions such as Business Performance Advisor, Project Finance Advisor (at Shell Dubai, UAE) and Finance Manager New Ventures before joining Sofis as CFO. At Sofis, a medium size supply company to the energy & process industry with multiple branches worldwide, Stan developed his skills as a board member responsible for finance, IT and legal. Stan has a MSc and Drs in Economics from Erasmus University Rotterdam and holds a Postgraduate International Master of Finance and Control degree from Maastricht University.
Rik Kielman, CCO
Rik has 20 years’ experience in business development with a focus on the medtech industry. Prior to joining Sensius, he was responsible for business development in a start-up medtech company (Gannet). In this role he was responsible for the introduction of an innovative fracture fixation device in major European markets. Rik acquired first contracts with hospitals for clinical use and managed the fringe conditions, such as adaptation to national guidelines and reimbursement. Rik holds a BA in Business Management from Hanze University of Applied Sciences Groningen, The Netherlands.
Dan Fristedt, Head of Product
Dan Fristedt is Head of Product at Sensius since April 2025. He has over 25 years of experience in product management and product development. In the medtech industry he worked for Elekta, where he developed linear accelerator & brachytherapy hardware including control system and treatment planning software. His background includes leaderships roles at Vanderlande and Bullhorn. His track record shows product development strategies, managing engineering teams and driving product vision, while aligning all stakeholders to deliver complex solutions. Dan holds a Philosophy Licentiate and a Bachelor of Science from Linköping University.
David Restuccia, Regulatory Affairs & Quality Assurance Head
David has worked as a Regulatory, Clinical, and Scientific Affairs Consultant for medical device and pharmaceutical manufacturers since 2018. His primary focus is ensuring compliance and managing the registration of medical devices under the EU Medical Device Regulation (MDR). David joins the Sensius team to provide regulatory and quality support.
His experience spans a wide range of device types - including active, diagnostic, invasive, implantable, and software-based technologies - across therapeutic areas such as oncology, ENT, neurology, orthopaedics, dentistry, and surgery.
Michael Zeinoun, System Architect
Michael joined Sensius in January 2022, following the successful defence of his Ph.D. thesis entitled ‘’Development and validation of next generation hyperthermal technologies for nanomedical anticancer therapies’’. His research interests include thermotherapy, optical and magnetic hyperthermia, prototype design and development, power electronics, nanomedical technologies, bioinstrumentation, and biosensors. Prior to his PhD, he occupied various positions as a biomedical technician at healthcare companies and hospitals in Lebanon, where he developed his skills in handling and troubleshooting biomedical equipment. Michael has an MSc in Electrical Engineer, specialized in Biomedical Engineering from the University of Balamand, Lebanon, and holds a Ph.D. in Biomedical Engineering from the Universidad Politécnica de Madrid, Spain.
Eva Oberacker, Clinical Research
Eva joined Sensius in April 2025 after approaching the field of thermotherapy via basic and clinical research positions. After studying physics in Karlsruhe (Germany) and Grenoble (France), she gained research experience in electromagnetic field simulations and measurement in the context of MR safety and compatibility of passive implants at ultrahigh magnetic fields (7 T) in Berlin (Germany). On the search for clinical impact, Eva shifted her research towards the numerical development of an integrated radiofrequency applicator supporting diagnosis, thermotherapy and MR thermometry in the treatment of brain tumors for her PhD. After joining the hyperthermia group at Charité Universitätsmedizin Berlin allowed Eva to gain insight into the reality and needs of clinical thermotherapy applications. Eva holds an M.Sc. in engineering (ingénieur diplômé) and a diploma (Dipl.-Phys.) and PhD (Dr. rer. nat.) in Physics.
Henry Rodenburgh, Project Leader
Henry studied electrical engineering at University of Applied sciences Amsterdam and Business Administration at University of Applied Sciences Rotterdam.
Over the years he grew from designing software and electronics himself into a project leader of large multidisciplinary development projects for a variety of markets (laboratory, medical, agro, semiconductor). His interest in ‘how things work’ as a child developed into a deep passion for complex techniques and focus on the application. After working for several companies, he founded R2Pro in 2008. R2Pro is a product development company.
Within Sensius Henry is responsible for the project management of the development of both the hardware and software of the Focus product family.
Denise van Bavel, QA/RA Manager & User Expert
Denise has been working as a Medical User Experience (UX) Researcher and Designer for R2Pro | Product Development for almost 5 years. Within this capacity, she started working for Sensius in 2021.
As a Medical UX researcher Denise maps out what users – patients, nurses, physicians and other health care providers - want from a product and translates these many different opinions and wishes into one clear list of requirements. Not from the technical side, but from the human side. Next to this, as a QA / RA manager she maps out and manages activities from a regulatory point of view. Thus making sure that a developed product is safe, performs well and answers the real users’ needs.
Denise has a MSc degree in Industrial Design Engineering, with a specialization in Medical Design, from Delft University of Technology, The Netherlands.