Dr Din completed his General Practitioner training in 2005, and has worked in occupational medicine since, initially combining his work with General Practice. He was listed on the GMC register as an Accredited Specialist in Occupational Medicine in 2014. After specialist accreditation, he worked as a full-time NHS Consultant for Hywel Dda University Health Board, until after the pandemic.
Since 2002, he has mainly worked with Tata Steel UK, Welsh Local Health Boards and Welsh Local Authorities. He is an accredited Hand Arm Vibration Syndrome (HAVS) assessor, an expert in evaluating fitness for work, determining the effect of work on health, and promoting work as a health outcome.