Dr Roy van den Brink-Budgen is very widely known in the field of critical thinking. His experience is, in many ways, unrivalled. It includes the production of assessment materials, teaching the subject, staff training, and production of a wide range of material. He has taught thousands of students in various countries at all levels of education (primary, secondary, college, university, and in prison education). He has extensive experience in training teachers in various countries, including the UK, Singapore, France, Spain, India, and New Zealand. He has worked with companies in various industries (including, banking, oil, and waste management), and this work has included both staff training and the production of assessments for corporate clients.

He has produced innovative resources, and is renowned for effectively linking creative and critical thinking. He is the author of many articles and books on the subject. Indeed, his critical thinking books (and other resources) are used in many countries in the world.