Dr Sian Prior is Lead Adviser to the Clean Arctic Alliance, a coalition of 18 non-profit groups campaigning to prohibit the use and carriage of heavy fuel oil (HFO) as fuel in the Arctic. Sian focuses on interpreting marine science to support conservation and management advocacy, and building consensus around marine policy development. Priority areas of work include ocean governance and ecosystem-based management in relationship to shipping and offshore industries, marine protected areas and fisheries management. She also advises on polar shipping and in particular on the development of a legally binding Polar Code. Dr Prior has worked extensively for the non-governmental sector – both environmental and commercial, and been seconded to government positions. She has over 25 years of experience of contributing to a variety of international marine management and conservation frameworks including the International Maritime Organization which is responsible for regulating international shipping.