Sources of Electromagnetic Fields are ubiquitous both in our personal lives and at work. The Control of EMF at Work Regulations 2016 has provided a legislative requirement to protect workers and to train them. How do we decide on an appropriate level of training if we don’t want to train every employee? How do we protect the health and safety of ‘People at particular risk’ from the effects of EMF? This talk will answer these questions by detailing the approach taken within QinetiQ.