Prokopios (Akis) Tsirigakis is founder, Chairman and Co-CEO of Nautilus Marine Acquisition Corp. a SPAC listed on the Nasdaq (ticker: NMAR). He is a director of Ocean Rig UDW Inc. (Nasdaq : ORIG). In 2007 he founded and till 2011 was President and CEO of Nasdaq-listed Star Bulk Carriers Corp. (ticker: SBLK). In May 2005 he founded and was Chairman and CEO of Star Maritime Acquisition Corp. (AMEX: SEA). Former Director of Dryships Inc., (Nasdaq: DRYS).

Since 2003, was Managing Director of Oceanbulk Maritime S.A. In 1998 he founded and was Managing Director of Combine Marine Inc., a provider of third-party ship management services. Former Technical Director of Konkar Shipping Agencies S.A. and of Arkon Shipping Agencies Inc. of New York. Life-member of The Propeller Club of the United States, President of the Hellenic Technical Committee of RINA Classification Society. Masters (1979), B.Sc., in Naval Architecture, University of Michigan, Ann Arbor.