One of the pioneering counselling psychologists in the UK, he has served as assistant editor of 'Counselling Psychology Review' and held memberships of a number of BPS boards/committees over the last twenty years. These currently include the Professional Practice Board, Standing Committee for Psychologists in Health & Social Care, Standing Committee for Promotion of Equal Opportunities, The Psychologist Policy Committee and Psychology Education Board. Mumtaz has also been serving on the BPS Registration Committee for Psychologists Specialising as Psychotherapists since 2002.

Mumtaz teaches at Leeds Metropolitan University in the areas of personality and individual differences, abnormal psychology, clinical and counselling psychology and critical and philosophical issues in psychology. His research interests are individual differences; race, ethnicity, identity and culture; work stress; cognitive behavioural psychotherapy; hypnosis and neuro-linguistic-programming; issues of diagnosis in mental health. Mumtaz’s doctoral research focused on ethnicity, culture and communication in applied psychology education. Additionally he is also contributing to the University's links with Islam and Muslim issues in the West.

Currently, Mumtaz is the Faculty of Health's Diversity Champion and is a member of the Equality and Diversity Group.