About Us – OCS


Who We Are

OCS is, first, a 30-year old, established EPC company and fabrication yard for onshore & offshore plants and structures from the straightforward to the most complex like saturated deep diving systems for deep sea divers, cable lay support systems, offshore top side modules, and onshore plants such as sophisticated mud plants for marine supply bases, and other high quality steel structures for diverse industries.

OCS is also an environment engineering company for the treatment of hazardous wastes and effluents, particularly in upstream offshore drilling, in which it has advanced systems and products incorporating several approval-pending patented processes.  Its products include the world’s most advanced Liquid Mud Plant Barge (LMPB) which can store, blend, cleanse, recycle, and dump.   This LMPB is not only superior in environmental control than any existing system but also give significant cost savings for offshore drilling operations.

Finally, OCS is also a water treatment company specialising in the processing and supply of DI water (de-ionised) for small and big industries.  We also cater for potable water systems and hazardous water treatment in collaboration with our strategic partners.

On request, we can undertake Consultancy, Supervision and Project Management for Clients building plants or structures in countries outside Singapore.

In summary, OCS is one of Asia’s leading EPC company, a fabrication yard, an offshore environmental engineering company, and a water treatment company.  Its large clientele of over 50 international-names clients attest to the sophistication, quality and reliability of our services and products.

Our Expertise

Offshore and Onshore Deliverables (Greenfield & Brownfield)

Tank Farms; Pressure Vessels; Project Management; Pre-fabricated systems delivered & commissioned onsite. Brownfield Facilities Upgrades; Greenfield Facilities Developments; Offshore Fixed and Floating Facilities and FPSO Developments; FPSO oil heater systems, Hose reels, H2S Scrubbers; Process Equipment and Systems Fabrication & Delivery; Gas Compression skids; Gas Dehydration and TEG Regeneration skids; Produced Water Treatment modules; Gas Sweetening (Amine Unit) modules; Sulphur Recovery Units; Water Injection Systems; Recovery System.

Drilling Fluids Process Design, Module & LMP Delivery

Conceptual/Feasibility Studies; Pre-Bid Engineering; Front End Engineering Design (FEED); Basic Engineering; Detailed Engineering. Shaker Process; Active (low pressure) System Process; Liquid Mud Plant; Liquid Mud Plant Barge; Liquid Mud Plant Modular; Dryer-Centrifuge-CRI-Thermal modules/cantilevers pre-plumbed; Hazardous Drains Process. Modules up to 500 mt.  Also we carry an ABS approved LIQUID MUD PLANT BARGE designs set up for zero-discharge.modules; Gas Sweetening (Amine Unit) modules; Sulphur Recovery Units; Water Injection Systems; Recovery System.

12-24 Man Dive Saturation System

OCS has our own Dive Saturation design. Quality, DNV relationship and experience contribute to our excellent track record with the quickest delivery times on spec. We continue to provide the industry with these designs as well as support A-frame dive support systems. We specialize in the steel work associated with the vessels, hatches and docking mechanisms. All Commissioning onsite.

Client Driven Needs

Quayside in Singapore for 20+ years has required OCS to have donned worn different hats through our existence. Refining Facility Decommissioning and Break-down; Wave-Pool Development and Installation; Vessel Repair; ABS approved LIQUID MUD PLANT BARGE designs; Proprietary Hazardous Drains Process.

We focus on total system responsibility, from conceptual design, engineering, to support during fabrication, installation and commissioning.





OCS maintains 100 employees and go up to > 400 when demanding jobs call for it.


Our quality management system comply with statutory and regulatory requirements in accordance with ISO 9001:2008 standards, ISO 14001 and OHSAS 18001:2007;  ASME accreditation code symbol ‘U’ and ‘R’ requirements.

The company had completed many projects that meet classification requirements from ABS, DNV, Lloyd’s, GL, BV etc. We have done E & I systems for complete modules to adhere to NORSK, CE, INMETRO, IECX requirements. International codes that our company adheres to are AWS, ASME, EN, BS, and Australian Standards, etc., to name a few.


OFFSHORE CONSTRUCTION SERVICES is registered within the following organizations as “Vendor” and/or “Supplier status:

  • JFD Lexmar
  • Mermaid Subsea Services (Thailand) Ltd
  • Ultra Deep Subsea Pte Ltd
  • Flash Tekk Engineering Pte Ltd
  • Single Buoy Mooring Inc
  • Schlumberger
  • Cameron Sense AS
  • M-I Swaco
  • Weatherford
  • MH Wirth
  • McGregor
  • ETA Process Plant
  • Bumi Armada
  • Allseas Engineering BV
  • Geoocean SA
  • Technip Oceania Pty Ltd
  • Shelf Subsea Solutions Pte Ltd
  • Geolog International BV
  • Baker Hughes
  • Heerema Marine Contrators
  • Keppel FELS Ltd