Organisational influences on safety outcomes are the subject of much attention in both academia and industry with a focus on how workplace factors and company systems, both formal and informal, influence workers. Many individuals who make important decisions for safety are not simply employees of a particular firm, but also members of a profession. This second social identity is little studied or acknowledged and yet is it critical for safety. This chapter addresses two key social practices that influence safety outcomes. The first is professional learning for disaster prevention. Research has shown that much professional learning is profoundly social including sharing stories and using stories directly as an input to key decisions. Another critical professional activity is development of standards. Standards are seen as authoritative sources and so 'called up' in legislation and yet the processes by which they are developed are opaque to those outside the small group of professionals involved. Again, this important social practice of groups of professionals remains little studied. Professional social practices such as these are worthy of much more attention from both academia and industry.