Trefor Evans

Institute Fellow

Director of Research

Trefor Evans
Trefor Evans

Institute Fellow

Director of Research

Dr. Trefor Evans has worked in the Hair Care industry for over 30 years. The first half of his career was spent as a scientist and manager in the product development labs of large consumer goods companies (Unilever, Helene Curtis). Since joining TRI in 2007 he has held the roles Director of Measurement Services and Director of Research and now has the title Institute Fellow.

Dr. Evans is highly active in the hair care industry through many working relationships with companies of every shape, size and background. He is a regular presenter at International hair conferences and has been an invited speaker at many technical meetings and symposia worldwide. Additionally, he has served as Chairman for the past five iterations of the International Conference on Applied Hair Science. He has published numerous articles in the scientific literature and trade magazines and is co-author and co-editor of the book “Practical Modern Hair Science”. He writes a regular column on hair testing and hair science for Cosmetics and Toiletries magazine and serves on their Scientific Advisory Board.

Dr Evans possesses a Ph.D. in the area of physical analytical chemistry and has spent his career using instrumental testing approaches to support the development, launch and maintenance of many international cosmetics products and brands. Such approaches also continue to be at the heart of fundamental research programs that have resulted in seven patents and have thrice been awarded by the Society of Cosmetic Chemists.


He regularly teaches and facilitates training classes on the topics of hair science and hair product claims which have been held in the US, Europe and Asia. He also teaches a customizable 1-man, 1-day course that has been conducted on-site at numerous client companies. He guest-lectures on Hair Science and the Hair Care Industry for a variety of academic cosmetic programs and has instructed at various educational events organized by the Society of Cosmetic Chemists (SCC). He has previously served on the SCC’s Education Committee and currently sits on their Committee on Scientific Affairs.


He is also an Adjunct Professor at the University of Cincinnati and is Editor-in-Chief for the Journal of Cosmetic Science.