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Dr John Calleya worked as a Submarine Naval Architect in a UK shipyard while completing a Naval Architecture Master's at University College London (UCL).
After completing a PhD at UCL in designing ships for lower greenhouse gas emissions, John secured further research funding to develop a holistic ship energy model, leading the engineering effort in a techno-economic shipping sector model, including working in a consultancy role with leading shipping companies and leading the RINA delegation to IMO MEPC meetings.
John worked at a ship performance monitoring company, before joining the International Maritime Organization (IMO) in 2018. John is responsible for administering the IMO Data Collection System, the EEDI database and is an IMO expert for matters related to air pollution.