Our Team

Mark D. Gordon
Chief Executive Officer & Chairman of the Board

Mark D. Gordon was appointed Chief Executive Officer of Odyssey Marine Exploration in October 2014. Mr. Gordon also served as the company's President from 2007-2019 and on Odyssey's Board of Directors since January 2008.  He joined Odyssey in 2005 as an independent consultant before serving as Director, Business Development and Executive Vice President of Sales and Business Development, where he was responsible for the Attraction, Business Development and Retail Merchandising operations for the Company.

Prior to joining Odyssey, Mr. Gordon started, owned or managed four different entrepreneurial ventures from 1987 to 2003, including Synergy Networks which he founded in 1993 and served as CEO until September of 2003 before selling the company to the Rockefeller Group. He continued serving as President of Rockefeller Group Technology Services Mid Atlantic (RGTSMA), a member of Rockefeller Group International, until December 2004. Past work experience also includes a two-year tenure as a Management Consultant at Arthur Andersen Consulting (now Accenture).

Mark Gordon received a B.S./Business Administration in 1982 and an MBA in Finance in 1983 from the American University. As a shipwreck diver with the National Diving Center in Washington DC, he has conducted hundreds of dives and explorations on shipwrecks and was the first person to discover and dive on the wreck of the S.S. Proteus, a ship that had been missing since the early 1900s. Mark is also a board member for Marine Applied Research & Exploration. 

John D. Longley
Chief Operating Officer & President

John D. Longley was appointed Chief Operating Officer in October 2014 and became President of the company in 2019. Previously, Mr. Longley served as Senior Vice President since 2012 and Director of Business Operations since 2005 when he joined the company. With over 25 years of marketing and business strategy experience, he has been integral in growing the company’s business opportunities including its attractions, the monetization of valuable shipwreck finds and exploring new deep-ocean opportunities that utilize Odyssey’s core competencies. 

Mr. Longley has an instrumental role in executing major marketing programs and projects at Odyssey. Following the Gairsoppa silver recovery operations that took place in 2012 and 2013, Mr. Longley led the program to monetize the 110 tons of shipwreck silver bullion, which constituted the world’s largest precious metals recovery from a shipwreck in history. Odyssey’s first major shipwreck discovery was in 2003 when the company located the greatest treasure of the Civil War-era and recovered over 51,000 gold and silver coins along with 14,000 artifacts. Mr. Longley has orchestrated the development of Odyssey’s global distribution network for shipwreck coins and collectibles, which reaches millions of shipwreck collectible buyers. Mr. Longley directs Odyssey’s traveling exhibit SHIPWRECK! which has been on a tour through 13 North American cities since 2005 and continues today. Over two million guests have seen the exhibit, which features over 500 shipwreck artifacts, interactive games and graphic panel displays.

Prior to joining Odyssey, Mr. Longley served as Vice President of Sales and Marketing for Public Imagery from 2003 to 2005 and Director of Retail Marketing for Office Depot North American stores from 1998 to 2003. Mr. Longley graduated with a Bachelors of Science degree in Communications with a specialty in Advertising from Florida State University in 1989.

Jay Nudi
Chief Financial Officer

Jay A. Nudi was appointed Chief Financial Officer in 2017 after serving as Interim Chief Financial Officer since June 2016.  He has served as Treasurer since 2010 and as Principal Accounting Officer of the Company since January 2006. Mr. Nudi joined the Company in May 2005 in the Corporate Controller capacity. Mr. Nudi has over 34 years of accounting, finance and strategic management experience and is a Certified Public Accountant.

Prior to joining the Company, he served as Controller for The Axis Group in Atlanta since 2003. From 2001 to 2003, he served as an operational and financial accounting consultant to various companies on specific value-added corporate projects. From 2000 to 2001, Mr. Nudi was Director of Financial Reporting for OneSource, Inc., a leading $1.0 billion provider of facilities management. From 1997 to 2000, he served as Corporate Controller for Acsys, Inc., a $100.0 million national recruiting firm that was publicly held until it was acquired in 2000. Mr. Nudi received a B.S. degree in Accounting from Penn State University in 1985.

Laura Barton
Secretary, Executive Vice President and Director

Laura L. Barton was elected to the Board of Directors in 2019 and also serves as Corporate Secretary (2015) in addition to her position as Executive Vice President and Director of Communications, which she has held since 2012.  With over 35 years of business experience including more than twenty years at Odyssey, she has extensive marketing, media, project management, content development, corporate governance, investor relations, management and strategic planning experience. She formerly served as Vice President of Communications from November 2007 to June 2012 and Director of Corporate Communications and Marketing for Odyssey since July 2003

Prior to joining Odyssey, Ms. Barton was President of LLB Communications, a marketing and communications consulting company that provided services to a variety of broadcast networks, stations and distributors, as well as the Company. She also taught as an adjunct instructor at the University of South Florida. Prior to founding LLB Communications, she served in various marketing, promotions, publicity and creative services positions in local and network television since 1983. She received a B.A. degree in Mass Communications from the University of South Florida.

Andrew Craig
Director of Marine Operations

As Marine Operation Director, Andrew Craig Craig is responsible for the management and acquisition of Odyssey's high-tech deep-ocean tools as well as leading operations aboard Odyssey’s vessels. Mr. Craig has extensive knowledge in mechanical engineering and the archaeological operations of recovery using ROVs.


Since joining Odyssey in 2003, Mr. Craig has participated in the operations for all of the company’s most significant shipwreck finds, including the SS Republic, a Civil War-era steamship containing 51,000 gold and silver coins; the “Black Swan” site which yielded 17 tons of silver coins, the largest collection of treasure ever discovered at a deep-ocean site; and the 1744 shipwreck of Sir John Balchin’s HMS Victory, one of the greatest unsolved maritime mysteries in British history. Mr. Craig also directed the Odyssey crew during the 2012-2013 SS Gairsoppa project which has resulted in the heaviest and deepest recovery of precious metals from a shipwreck site in history. In the summer of 2014, Mr. Craig helped lead Odyssey’s marine operations team during the Central America expedition which yielded the recovery of over 15,500 silver and gold coins, 45 gold ingots, hundreds of gold nuggets, dust and jewelry.


Prior to joining Odyssey, Mr. Craig was the Operations Manager for Sub-Surface Engineering, where he mobilized and executed hydrographic and topographic surveys, diving operations, and ROV inspections.  Mr. Craig has also worked as a commercial and recreational dive instructor. 


Mr. Craig has a Bachelor of Sciences, with honors, in Underwater Studies with Hydrography from Plymouth University. Mr. Craig has also earned a Higher National Certificate in Mechanical Engineering from Lackham College. Mr. Craig was featured on both of Discovery Channel’s hit series TREASURE QUEST and SILVER RUSH.

Greg Stemm
President, International Marine Minerals Society
Co-Founder, Chairman Emeritus, & Consultant, Odyssey Marine Exploration

Greg Stemm 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. In 1986, Mr. Stemm acquired his first research vessel and embarked on a mission to create a company dedicated to developing the world's most advanced ocean exploration capabilities  while adhering to the highest scientific standards.

Greg is currently President of the International Marine Minerals Society, a non-profit organization whose members share a common interest in the study marine minerals as a resource and sound application of environmental standards to meet world demands for minerals in a sustainable manner. IMMS includes a worldwide membership of individuals from industry, government agencies, and academic institutions, whose objectives are to promote and improve the understanding of marine mineral deposits within the province of the global ocean; aid in the interchange of information among members through networking and formal symposia; encourage the prudent development of marine mineral resources, including concern for the environment; and encourage research in all aspects of marine minerals development.


IMMS is also the primary sponsor of the annual Underwater Mining Conference (UMC)—an international forum that for 47 years has been bringing together the marine mining community to exchange ideas and foster partnerships for research, exploration, and mining ventures as well as graduate student participation. He is the Chairman of the 48th annual UMC being held in Sanya, Hainan, China Sept 21 - 26, 2019.


​Odyssey Marine Exploration, which Stemm co-founded and is currently Chairman, has engaged in extensive deep ocean mineral exploration projects throughout the world, ranging from shallow water to depths of 6,000 meters using the world’s most advanced technologies. The company, utilizing its 100 meter exploration vessel, has undertaken extensive expeditions to conduct environmental baseline studies and investigate mineral resources throughout the Pacific, including projects in New Zealand, Vanuatu, Fiji, Tonga, Papua New Guinea and the Solomon Islands. After extensive exploration, environmental studies and coring work the company has located and received a mining license and 43-101 resource assessment for its Oceanica phosphate deposit in the Pacific, which features measured, indicated and inferred resource of nearly 500 million tons of high quality ore, making it one of the world's most significant strategic underwater mineral resources.


Odyssey has also discovered and has explored more shipwrecks than any other company, academic group or government organization in the world. Its discoveries and deep sea archaeological excavations have resulted in recovery of nearly $750 million in valuable commodities and artifacts, in depths ranging from 100 meters to well over 4,500 meters. These projects have also resulted in hundreds of articles, scientific papers and popular publications. In addition to these significant discoveries, Mr. Stemm has directed offshore operations which have resulted in the discovery of modern airplanes for government agencies and hundreds of shipwrecks, ranging from ancient Roman and Phoenician sites to previously undiscovered U-boats and pirate ships in the deep oceans of the world.


Stemm was a panelist at the 1998 Law of the Sea Institute and was appointed for 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 at UNESCO headquarters in Paris.


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 including UNESCO, The Explorers Club, Institute of Nautical Archaeology, Young Presidents’ Organization, World Presidents’ Organization, World Business Council, Association of Dive Contractors, The UK National Shipwreck Conference and has been a frequent enrichment lecturer for Cunard, Silver Seas, and Seabourn Cruise Lines.


Greg has been featured as an expert on deep-ocean exploration on international television and radio programs for the past thirty years. National Geographic and PBS broadcast a one hour special on the recovery of the SS Republic, and Discovery Channel profiled Mr. Stemm and his company in 2009 as they explored the English Channel in a 13 part documentary series which was broadcast worldwide. Odyssey’s recent successes have also been filmed and were featured on the Discovery Channel in the Silver Rush mini-series.


He is a Fellow of The Explorers Club, and was the founder and past-president of the Professional Shipwreck Explorers Association (ProSEA), a non-profit group that provides a forum through which private sector explorers, archaeologists and governments cooperate to promote ethical policies for dealing with shipwreck resource management.


Stemm also served as a Founding Director (1986-93) and International President (1992-93) of EO (Entrepreneurs Organization), the world's largest entrepreneur's organization with over 12,000 members in 176 chapters in 60 countries who represent over $200 Billion in sales annually. He was also a major financial contributor and assisted in the creation and development of the Florida Aquarium in Tampa Florida.

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©Odyssey Marine Exploration, Inc. 2020