Yousuf Mohammed is a research leader within one of the University of Queensland’s premier research institutes, Frazer Institute. He has been working within the field of cosmetic dermatology, sensory perceptions, skin delivery, novel technologies and devices, microneedles, and nanomaterials and has contributed significantly to the field with over 75 high-impact publications, book chapters, and over 40 conference presentations. He is presently the Vice-Chair of the American Association of Pharmaceutical Scientists' Topical Transdermal Committee and an invited expert on transdermal products. In the last few years, his work has developed the conceptual framework to describe the physicochemical and structural arrangement of matter in semisolid dosage forms, devised the technical methods for characterizing these attributes, and elucidated how the four-dimensional profiles of these attributes directly and predictably modulate the rate and extent of drug delivery. These breakthroughs have transformed multiple fields of medicine. His research has directly supported new paradigms for topical and transdermal drug development, with a corresponding modernization of regulatory standards. As an outcome of his work, it is now possible to predict and control the performance of a semisolid product. In the United States and Europe alone, more than 80 regulatory guidances and guidelines now recommend the use of these new techniques to develop topical and transdermal products.