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839 companies

Offshore Marine Service Association OMSA

New Orleans,, LA, United StatesUpdated Sep 2016

Offshore Marine Service Association (OMSA) is a non-profit organization representing U.S. offshore marine transportation companies, promoting industry interests and providing a united front on legislative and governmental matters.

Offshore Shipbuilding Inc.

Palatka, FL, United StatesUpdated May 2026

St. Johns Ship Building (operating as Offshore Shipbuilding Inc.) is a full-service marine facility in Palatka, Florida specializing in new construction and repair of steel and aluminum vessels including ferries, tugs, barges, landing craft, and crew transfer vessels.

Oil and Gas Online

Location not listedUpdated Dec 2002

Oil and Gas Online is a digital marketplace providing news, solutions, and information for the oil and gas exploration, drilling, production, construction, and engineering industry.

OilExec International

Location not listedUpdated Feb 2008

OilExec International is a leading recruitment and staffing services company specializing in the global oil and gas, energy, marine, infrastructure, and construction industries.

Olivera SA

Porto, PortugalUpdated Jul 2005

Olivera SA is a Portuguese manufacturer specializing in synthetic and wire ropes for demanding industrial applications including maritime, fishing, construction, and cranes, with nearly 200 years of experience and part of WireCo WorldGroup since 2010.

Oma Baatbyggeri a.s

Stord, NorwayUpdated Sep 2001

Oma Baatbyggeri a.s is a boat building company based in Stord, Norway, specializing in maritime vessel construction and repair.

Onomichi Dockyard Co Ltd

Chuo-ku, Kobe, JapanUpdated Jun 2011

Onomichi Dockyard Co Ltd, established in 1943 in Hiroshima Prefecture, specializes in shipbuilding, ship repair, and construction, producing a variety of high-performance vessels including bulk carriers, tankers, and Ro/Ro cargo ships.

Oregon State Univ.College of Oceanography

Newport, OR, United StatesUpdated May 2026
Training

Oregon State University's College of Earth, Ocean, and Atmospheric Sciences operates marine research facilities at the Hatfield Marine Science Center in Newport, OR, serving as home port for research vessels including the RV Elakha and the RV Taani (under construction).

Orfanos Contractors Inc.

Baltimore, MD, United StatesUpdated Dec 2002

Orfanos Contractors Inc. is a Baltimore, Maryland-based marine and commercial contracting company specializing in waterfront and port construction, including pier and dock construction.

Orion Marine Group

Houston, TX, United StatesUpdated Dec 2005

The most comprehensive range of marine services available from a single source! There is no other marine construction and services company quite like Orion Marine Group. In addition to our integrated organization, experience, and depth of resources, we have something else that’s very important – a reputation for integrity and dependability earned by our team in performing on time, on budget projects for more than 60 years.

Osmose Marine Products Group

Griffin, GA, United StatesUpdated Jul 2001

Osmose Marine Products Group manufactures PILE-GARD, a pile protection system that shields timber piles from marine borer damage and steel piles from waterline corrosion by eliminating oxygen exposure.

PPL Shipyard Pte Ltd

Singapore, SingaporeUpdated Nov 2001

PPL Shipyard Pte Ltd specializes in the design and construction of specialized offshore vessels, marine terminals, and offshore drilling rigs from shallow to deep water.

Pal Indonesia Shipyard

Location not listedUpdated May 2026

PT PAL Indonesia is a state-owned Indonesian shipbuilding and heavy engineering company headquartered in Surabaya, specializing in the construction and repair of commercial vessels, naval ships, and offshore structures.

Pan Marine Constructors Inc.

San Francisco, CA, United StatesUpdated Nov 1998

Pan Marine Constructors Inc. is a San Francisco Bay Area marine contractor specializing in waterfront construction, pile driving, and dock and pier construction.

Pan-United Marine Limited

SingaporeUpdated Nov 2006

We are a public listed Marine Company in Singapore with Shipyard facilities in Singapore and Indonesia, Batam Island. We have the capacity to dry-dock ships upto 80,000 dwt, alongside repairs/conversions upto 100,000 dwt and new building of ships upto 30,000 dwt. We also carry out Offshore Fabrication and Installation Work and Engineering Constructions. (E.g: New building of Container Quay Cranes, Pipe Racks, Skid Beams, etc.) Both of our shipyard facilities, namely Pan-United Marine Limited in Singapore and PT. Pan-United Shipyard Indonesia in Batam Island are certified with ISO 9001. To provide a one-stop service, our subsidary company, Cheong Eng Engineering Services Pte Ltd provides anchorage and voyage repairs for our valued Customers.

Patent ConstrOn Sys. (Harsco Corp.)

Paramus, NJ, United StatesUpdated Nov 1998

Patent Construction Systems, a division of Harsco Corporation, supplies scaffolding, shoring, and access systems for marine, shipyard, industrial, and commercial construction projects.

Patti Shipyard, Inc.

Pensacola, FL, United StatesUpdated Mar 2005

Patti Shipyard, Inc. is a Pensacola-based builder and repairer of commercial vessels including fishing boats, passenger vessels, tugs, and specialized marine craft with a legacy dating back to the 1930s.

Patti's Ship Yard

Pensacola, FL, United States

Patti Marine Enterprises, Inc. is a Pensacola-based shipyard specializing in the construction, refit, repair, and conversion of commercial vessels including fishing boats, passenger vessels, tugs, and barges.

Pattje Shipyards

Groningen, NetherlandsUpdated Jul 2001

Pattje Shipyards is a shipyard located near Groningen, Netherlands, known for constructing various types of vessels including inland tankers, coasters, hopper dredgers, bunker ships, and work boats with a reputation for quality craftsmanship and innovative engineering.