Co-Founder &
Chairman Emeritus

Greg Stemm is an entrepreneur, pioneer and widely recognized leader in the field of deep-ocean exploration. He has played an important role in the development of new advanced technologies and private sector standards for ocean mineral exploration, shipwreck archaeology and underwater resource management for over 30 years.


Mr. Stemm was the Past President of the International Marine Minerals Society (IMMS), the oldest and largest international organization with the mission to promote the field of ocean mineral science, research and commerce. Previously, he was Chairman of the Board for Odyssey Marine Exploration until June 2019 and is currently Chairman Emeritus. He also served as Chief Executive Officer of Odyssey from January 2008 to October 2014 and as a Director and in various capacities including Chairman and Director of Operations since May 1994. During this time, he was responsible for research, project development, funding and operations on all shipwreck, marine exploration and offshore mineral projects.


He has authored and edited over 50 papers and articles on deep-ocean marine exploration and archaeological investigations, and has given hundreds of lectures on the subject to a variety of venues. He is the co-editor of the Oceans Odyssey series which features a broad range of scientific papers relating to shipwrecks and exploration in the deep ocean. He was also a panelist at the 1998 Law of the Sea Institute and was appointed to four consecutive terms to the United States delegation to the United Nations Educational, Scientific and Cultural Organization (UNESCO) expert meeting to negotiate the Convention for the Protection of Underwater Cultural Heritage (CPUCH) at UNESCO headquarters in Paris, France.


Mr. Stemm has been featured as an expert on deep-ocean exploration on international television and radio programs.


In 2017, Mr. Stemm was honoured with the Freedom of the City of London Award, one of the oldest surviving ceremonies in existence. The prestigious award is believed to have been first presented in 1237 and has included such notable figures as Sir Winston Churchill, Florence Nightingale, Bill Gates and Charles Lindbergh. Mr. Stemm received his illuminated Freedom scroll at a ceremony presided over by the Mayor of the City of London, followed by a banquet at Guildhall on September 3, 2017. The honour historically provided special trading rights and privileges (including the right to go about the City with a drawn sword and take their livestock tax free over the London Bridge) to individuals who have provided exemplary service to the UK and the City of London and have shown success and recognition in their chosen field.

Greg Stemm

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