Julian Hewitt graduated from Oxford University in 1988 with a BA Honours Degree in Chemistry. After graduating, he joined Tioxide, working on new product development. In 1991, he joined Tioxide’s physical sunscreens business, remaining with the business as it moved from Tioxide to ICI, Uniqema, and finally Croda. During this time, Julian represented Uniqema and Croda as a technical expert for sun care products, developed and delivered training programmes for both internal and external audiences, and guided the development and launch of innovative new sun care ingredients. Julian left Croda in October 2011 and formed JPH SunCare Technologies, providing technical consultancy services, regulatory advice, and training to manufacturers of UV protection products and ingredient suppliers. He has been a frequent speaker at international conferences and is member of the Editorial Advisory Board for the International Journal of Cosmetic Science.

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Dr. Alexandra Maldonado López is a scientific writer at Good Molecules, where she translates complex dermatological research into accessible, evidence-based content. She earned her Ph.D. from the Perelman School of Medicine at the University of Pennsylvania. She conducted her thesis research in the dermatology department, focusing on skin health and genetic/epigenetic disease mechanisms. With a strong background in biomedical research and science communication, Dr. Maldonado López bridges the gap between research and consumer education, ensuring scientific accuracy in skincare-related content. Her work supports product development and helps make cutting-edge skincare science understandable to a broad audience. Dr. Maldonado López is passionate about making science accessible and believes in the power of clear, evidence-based communication to empower both consumers and professionals in the skincare industry.

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David Allen, Ph.D., is the Senior Director of Human Health Sciences and Operationa st the International Collaboration on Cosmetics Safety (ICCS). In this role he is responsible for the strategic development and management of the organization's human health program and overall operations of ICCS. 

Prior to joining ICCS, Dave was the President of Integrated Laboratory Systems (ILS) and then Vice President of Inotiv, Inc., after they acquired ILS in 2022. Among his responsibilites at ILS and Inotiv, he was Principal Investigator of the National Toxicology Program Interagency Center for the Evaluation of Alternative Toxicological Methods (NICEATM) support contract. 

He's been a member of international Validation Management Teams for in vitro alternative test methods, during which he provided input on validation study design, data analyses, and test method recommendations. He has also participated on international expert consultations for new and revised OECD Health Effects Test Guidelines for alternative test methods. Dave has served as the President of the American Society for Cellular and Computational Toxicology, President, Society of Toxicology - In Vitro and Alternative Methods Specialty Section and received the 2017 SOT Enhancement of Animal Welfar Award. He received his Ph.D. from North Carolina State University. 

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With over three decades of expertise spanning regulatory affairs, scientific strategy, advocacy, and business development, Carl D’Ruiz is a recognized thought leader in sunscreens, cosmetics, and consumer skincare products that enhance beauty and well-being. Currently serving as Senior Manager, Beauty & Care Business Development for dsm-firmenich North America, Carl specializes in navigating the complexities of bringing groundbreaking innovations to market. His work includes spearheading DSM’s FDA OMOR submission for PARSOL® Shield (Bemotrizinol), advancing sunscreen standards in the U.S., and leading advocacy campaigns for safer sun care and sustainability. A skilled strategist, Carl delivers tailored solutions that accelerate product commercialization and drive growth. Carl’s impactful career reflects a deep commitment to public health, innovation, and industry leadership. He has previously presented at the Sunscreen Symposium, where his insights continue to shape the future of sun protection and skincare.

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Jeroen van den Bosch has been involved in the development of ultrafine zinc oxide products and their applications in suncare for over 25 years. He started his career in an R&D capacity at Umicore where he focused on the development of a range of zinc oxide products for sunscreens and industrial applications and started a dedicated dispersion lab focusing on dispersing and sizing techniques for nano-sized materials. From R&D he moved into various business development roles with a focus on sunscreen applications and is now heading up Uviva Technologies to bring to the market new and innovative ingredients in the suncare space. Jeroen was one of the driving forces in the Cosmetics Europe consortium responsible for the approval of zinc oxide as UV filter in Europe back in 2012 and is a member of the ISO Working Group 217 on Cosmetics.

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