In November 2019 he was appointed as the Behaviour Change Expert to the National Institute for Health and Care Excellence (NICE) “Vaccine uptake in the general population” public health guideline committee. NICE provides national guidance and advice to improve health and social care. He also served on the NICE organ transplantation clinical guideline development group (2010, 2013, 2016). He was appointed as an Expert Adviser for the NICE Centre for Guidelines (2017-2020). In 2017 he was appointed to the NIHR Policy Research Unit Commissioning Panel. He was a member of UK National Institute of Health Research (NIHR) Health Services & Delivery Research Grants Board (2010-2017) and the UK NIHR Programme Grants Board for Applied Research (2011-2014). He was the British Psychological Society Representative on the Executive Committee of Scottish Intercollegiate Guideline Network (SIGN) (2009-2021). He was Chair of the Scientific Programme Committee for the International Congress of Behavioural Medicine (ICBM) 2014, and served on the Scientific Programme Committee for ICBM 2016. He was Associate Editor of Health Psychology and the British Journal of Health Psychology. He serves on the Editorial Boards of Annals of Behavioral Medicine, Psychology and Health, British Journal of Health Psychology and the Journal of Behavioural Medicine.