Offshore Construction Vessel Jobs

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About Offshore Construction Vessels

An offshore construction vessel is a ship or unit that supports work at sea rather than carrying cargo from port to port. This group covers DSV, crane vessel, pipe laying vessel, cable laying vessel, drilling vessel or platform, jackup, semi-submersible, WTIV, seismic, survey, research, accommodation barge or vessel and FPSO. The crew may handle cranes, pipelay gear, cable lay gear, diving systems, ROVs, drilling packages, wind components or survey equipment. Work is project-based and often uses dynamic positioning. Common roles include Master, Chief Officer, Second Officer, Third Officer, Chief Engineer, Second Engineer, Third Engineer, ETO, Bosun, AB, Motorman/Oiler, Fitter, Cook and Messman. The work differs from tanker or bulk carrier work because heavy lifts and subsea operations are central.

Cargo and operations

These vessels do not carry a normal cargo. They carry equipment and support work: cranes, pipelay or cable lay gear, diving systems, ROVs, drilling packages, wind turbine parts, survey equipment or accommodation. Some units, such as an FPSO, store and process hydrocarbons. Main risks are heavy lifts, mooring line failure, dynamic positioning loss, subsea work, diving operations, confined spaces, electrical systems and bad weather.

Crew on board

The Master leads the unit and works closely with the Chief Officer, project managers and client representatives. Chief Officer runs deck work and lifting plans. Second and Third Officers keep navigational watches and support dynamic positioning. Bosun and AB handle mooring, cranes, rigging and deck equipment. Chief Engineer, Second and Third Engineer run power, thrusters and machinery. ETO and Electrician care for electrical and control systems. Motorman/Oiler and Fitter keep engines and equipment working. Cook and Messman feed the crew.

Special training

No special certificate for offshore construction vessels as a group is set in the convention. Crew need BST under STCW VI/1 and security-related training under STCW VI/6. Deck and engineer officers hold a CoC for their rank and ship size under STCW II/1, STCW II/2, STCW III/1, STCW III/2 or STCW III/3. AB and Bosun need STCW II/5 on ships of 500 GT or more. Motorman, Oiler and Fitter need STCW III/5 on ships with main propulsion of 750 kW or more. ETO needs STCW III/6 on such ships. If the unit is an oil or gas carrier, STCW V/1-1 or STCW V/1-2 can apply.

Requirements

Document	Convention	Note
BST (Basic Safety Training)	STCW VI/1	Seafarers must receive safety familiarization and basic training or instruction.
Security-related training	STCW VI/6	Seafarers must receive security-related familiarization and security-awareness training or instruction.
CoC for Master and Chief Officer on ships of 500 GT or more	STCW II/2	Every master and chief mate on a seagoing ship of 500 gross tonnage or more must hold a certificate of competency.
CoC for Officer in charge of a navigational watch on ships of 500 GT or more	STCW II/1	Every officer in charge of a navigational watch on a seagoing ship of 500 gross tonnage or more must hold a certificate of competency.
Able seafarer deck certification	STCW II/5	Every able seafarer deck serving on a seagoing ship of 500 gross tonnage or more must be certificated.
CoC for Officer in charge of an engineering watch on ships of 750 kW or more	STCW III/1	Every officer in charge of an engineering watch on a seagoing ship with main propulsion machinery of 750 kW or more must hold a certificate of competency.
CoC for Chief Engineer and Second Engineer on ships of 3,000 kW or more	STCW III/2	Every chief engineer officer and second engineer officer on a seagoing ship with main propulsion machinery of 3,000 kW or more must hold a certificate of competency.
CoC for Chief Engineer and Second Engineer on ships of 750 kW to 3,000 kW	STCW III/3	Every chief engineer officer and second engineer officer on a seagoing ship with main propulsion machinery between 750 kW and 3,000 kW must hold a certificate of competency.
Able seafarer engine certification	STCW III/5	Every able seafarer engine on a seagoing ship with main propulsion machinery of 750 kW or more must be certificated.
ETO CoC	STCW III/6	Every electro-technical officer on a seagoing ship with main propulsion machinery of 750 kW or more must hold a certificate of competency.
Oil and chemical tanker basic training if the unit is an oil or chemical tanker	STCW V/1-1	Officers and ratings with specific duties related to cargo or cargo equipment on oil or chemical tankers must hold a certificate in basic training for oil and chemical tanker cargo operations.
Liquefied gas tanker basic training if the unit is a gas carrier	STCW V/1-2	Officers and ratings with specific duties related to cargo or cargo equipment on liquefied gas tankers must hold a certificate in basic training for liquefied gas tanker cargo operations.

Sea service

No separate sea service rule for offshore construction vessels as a group is set in the convention. Sea service for a CoC follows the general rule for the rank, such as the service required for an officer in charge of a navigational watch.

Medical fitness

Seafarers may not work on a ship unless they are certified medically fit to perform their duties. Before beginning work on a ship, they must hold a valid medical certificate. The certificate states that hearing and sight, and colour vision where relevant, are satisfactory.

Documents

CDC or Seaman's book
Valid medical certificate
CoC or CoP for your rank
BST certificate
Security training certificate
Passport
Tanker or gas tanker certificate if the unit requires it

Ships in our database

3,900+ Offshore Construction Vessels in the Krew Guru ships database

Deadweight (DWT), most ships100–12,700

Gross tonnage (GT), most ships200–14,500

Range covers the middle 80% of ships of this type in our database.

Search ships by name or IMO

What employers on Krew Guru ask for

RanksSecond Engineer 23%, Chief Engineer 19%, Chief Officer (Chief Mate) 18%, Master (Captain) 15%, Third Engineer 10%

Contracts in rank (median)1

Contract length (median)6 months

Open to any nationality100%

Based on 62 vacancies on Krew Guru over the last 365 days.

Jobs on Offshore Construction Vessels: questions and answers

What does an offshore construction vessel do?

It supports work at sea. This can be lifting, pipelay, cable lay, diving, drilling support, wind turbine installation, seismic or survey work. Some units provide accommodation or process hydrocarbons. The crew works on projects, not a regular cargo route.

Do I need special vessel-type training for these vessels?

No special vessel-type certificate is set for offshore construction vessels as a group. Crew normally need BST under STCW VI/1 and security-related training under STCW VI/6. Tanker training under STCW V/1-1 or gas tanker training under STCW V/1-2 can apply if the unit is an oil or gas carrier.

Which documents should I prepare for an offshore job?

Prepare your CDC or Seaman's book, valid medical certificate, passport, BST certificate and security training certificate. Add your CoC or CoP for the rank you apply for. If the unit is a tanker or gas carrier, add the relevant tanker certificate. Keep copies ready for the client and flag State checks.

Can AB, OS and Fitter work on offshore construction vessels?

Yes. Bosun, AB and OS work on deck with mooring, lifting gear, rigging and maintenance. AB and Bosun need able seafarer deck certification on ships of 500 GT or more. Fitter, Motorman and Oiler work in the engine department. They need able seafarer engine certification on ships with main propulsion of 750 kW or more.

2 vacancies in the last 90 days

Sources

Checked against the official texts on 26 Oct 2026.