Malcolm joined the health promotion service in Merthyr Tydfil in 1995 as a generic Health Promotion Specialist gaining a postgraduate diploma in health promotion at University of the West of England in Bristol and subsequently a Masters degree in Public Health at the University of Wales College of Medicine. As a specialist in the promotion of physical activity he has advised on both policy development and programme delivery locally, nationally and internationally. He presently manages the public health networks in Public Health Wales and contributes to the International Health Co-ordination Centre. He is a board member and treasurer for EuroHealthNet He has contributed to a number of NICE guidance groups including those on obesity, behavior change and exercise referral, jointly leads a HEPA Europe working group looking at physical activity in health care settings and was a temporary expert advisor to the WHO Europe working group developing the regional physical activity strategy. He was the first person on the UK voluntary register of defined public health specialists, successfully completed the Physical Activity and Public Health Practitioners course in Utah in 2004 run by the Centres for Disease Control and Prevention and the University of South Carolina and has written for various publications on subjects including GP referral to exercise, men's health, the role of sports science in health, nutrition and workplace health.