Poseidon International has provided specialized maritime support to myriad military, commercial, and private customers around the world.

• Military Sealift Command (MSC) 

• US Army Corps of Engineers

• US Coast Guard

• Naval Surface Warfare Center Carderock Division (NSWCCD)

• Naval Sea Systems Command (NAVSEASYSCOM)

• National Oceanographic and Atmospheric Administration (NOAA)

• Defense Advanced Research Projects Agency (DARPA)

• Space and Naval Warfare Systems Command (SPAWAR) – San Diego, Ca.

• Marine Corps Systems Command (MARCORPSYSCOM)

• U.S. Navy

• Egyptian Navy

• Hellenic Navy

• Turkish Navy