Prof. Reuben Escorpizo is a rehabilitation clinician scientist and academic with established work in the biopsychosocial framework of the WHO International Classification of Functioning, Disability and Health (ICF), methodology, and outcomes measurement. Prof. Escorpizo is consulted nationally and internationally in relation to teaching, practice, and research of rehabilitation, physical therapy, outcome measurement, instrument development and validation, and the ICF. He is a leading figure in international efforts to investigate the biopsychosocial evaluation of functioning and disability using quantitative, classical psychometrics and item response theory, and qualitative approaches. He has published 1 book, 22 book chapters/e-chapters, over 130 publications, and has numerous invited keynotes and visiting professorships. He has been invited to international scientific committees and task forces like the ICF-Pain Task Force of the International Association for the Study of Pain, the International SCI Community Study, the ISCOS Core Data Set Committee for Vocational Rehabilitation, and the OMERACT Worker Productivity Group, and the Contextual Factors Group. He co-developed the Work Rehabilitation Questionnaire (WORQ), a questionnaire used in rehabilitation settings and translated into multiple languages worldwide.