Offshore Operations Limited

What Offshore Operations Limited does

Offshore Operations Limited is a UK-registered private company that delivers manning, consultancy, and operational support services to the offshore wind and marine renewables sector. The company is a subsidiary of CSO Marine Group, a maritime-focused conglomerate that also includes CSO Shipbrokers and CSO Engineering, and it was co-founded by Managing Director Josh Brennan, a former CWind (Global Marine Group) Director of Operations.

The company operates five core service lines offered on a modular, quote-based professional-services basis: Recruitment & Manning (sourcing and managing qualified offshore personnel — Masters, Mates, Engineers, Crane Operators, Deckhands — for CTVs, OSVs, RHIBs, PSVs, jack-ups and heavy-lift vessels, with payroll, visa, mobilisation and competency monitoring bundled in); Vessel Inspections (on-hire/off-hire, pre-purchase and due-diligence surveys); New Build Consultancy (specification, yard selection, project management and owner representation for vessels from 10m survey boats up to 90m SOVs and fleet builds); Logistic Support and Vessel Management (charter lifecycle support delivered alongside CSO Shipbrokers); and Asset Ownership and Vessel Investment advisory. The business is MLC 2006 certified and provides 100% crew abandonment insurance coverage.

Customers are enterprise-tier offshore wind developers, vessel owners, charterers and operators, with disclosed case-study work for CPower (Hollandse Kust Zuid, North Sea) and Foss, a Saltchuk Company (US offshore wind). Marketing is primarily sales-led via direct engagement, the CSO Marine Group sister-company channel, LinkedIn, case studies and website enquiry forms, with stated operational reach across the UK, USA and Southeast Asia. The firm operates with 1–10 employees from its Chelmsford, Essex headquarters, supplemented by London (CSO Shipbrokers) and Southampton locations and remote working options.

Name

Offshore Operations Limited

Legal name

Offshore Operations Limited

Website

https://offshore-operations.com

Company type

Private

Founded year

2008

Operating status

Operating

Headcount range

1–10 employees

Short description

Offshore Operations Limited is a UK-based subsidiary of CSO Marine Group providing manning, vessel inspection, new build consultancy, and charter support services to offshore wind developers, vessel owners, and charterers across the UK, USA and Southeast Asia.

Ownership category

akta.pro rank

Product category

Offshore Wind and Marine Support Services

NAICS

Support Activities for Water Transportation (4883), Other Support Activities for Water Transportation (48839)

SIC

Water Transportation (4400)

akta.pro primary industry

Marine & Offshore Energy O&M (Offshore Wind, Platforms, Subsea Assets) (EUAEAGAO)

Keywords

• Offshore personnel manning
• Vessel inspection services
• New build consultancy
• Charter support services
• Marine asset advisory

Headquarters

HQ city

Chelmsford

HQ country

United Kingdom

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. Recruitment and Manning Services: The company provides offshore personnel recruitment and manning services, sourcing qualified seafarers and marine professionals for vessel operations. Services include full 360-degree packages covering payroll, visa management, mobilisation, and ongoing crew management.
2. Vessel Inspections: Maritime inspection services including on-hire/off-hire inspections, pre-purchase inspections, and due diligence assessments for vessel owners, purchasers, and charterers.
3. New Build Consultancy: Consultancy services for new vessel construction including project management, contract management, tender evaluation, vessel specifications review, and owner representation during trials.
4. Asset Ownership and Vessel Investment Advisory: Advisory services for vessel purchase decisions, fleet management support, and asset investment guidance for new vessel owners.
5. Logistic Support and Vessel Management: Charter support services including initial requirement assessment through commencement, ongoing charter management, audits, and harbour dues handling.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

Offshore Operations Limited provides operational and technical support services to offshore wind and marine renewables businesses. Its service portfolio includes offshore personnel recruitment and manning, vessel inspections, new-build vessel consultancy, charter logistics and vessel management, and vessel ownership and investment advisory; clients can procure individual services or integrated turnkey packages.

Product overview

Offshore Operations Limited is a UK-based offshore wind and marine renewables support business offering a portfolio of operational and technical management and consultancy, agency, and ancillary services. The company operates as part of CSO Marine Group and provides five core service lines: Recruitment & Manning Services (offshore personnel staffing), Vessel Inspections (on/off hire and pre-purchase due diligence), New Build Consultancy (vessel construction management), Logistic Support & Vessel Management (charter support), and Asset Ownership & Vessel Investment advisory. The services are designed to be modular—clients can procure individual services such as a single vessel inspection or a full turnkey operational package combining crewing, charter, and project management. The company also collaborates with sister brands CSO Shipbrokers (charter broking) and CSO Engineering (marine design) within the CSO Marine Group.

Differentiator

Problem solved

Functional benefit

Products and services

• Recruitment & Manning Services Provides tailored project manning solutions for the offshore wind and marine renewables industries, sourcing vetted personnel such as Masters, Mates, Chief Engineers, Officers, Crane Operators, and Deckhands for CTVs, Multicats, OSVs, RHIBs, TUGs, PSVs, jack-up vessels, workboats, and heavy lift vessels. The package includes payroll, visa management, mobilization, training, and competency monitoring.
• Vessel Inspections Provides on-hire and off-hire inspections and pre-purchase inspections for maritime due diligence. Services include ISM review, certificate inspection and authentication, assessment of vessel condition, structural condition, machinery spaces, accommodation areas, safety equipment, coating condition, and optional bunker remaining-on-board and fuel-sampling checks.
• New Build Consultancy Provides new-build vessel management and supervision spanning vessel specification, yard selection, construction, due diligence, and project management. The service supports projects ranging from 10M survey vessels to 90M SOVs and workboat fleets, including hybrid designs, and includes owner representation during trials.
• Logistic Support and Vessel Management Provides charter support from initial requirement assessment through commencement, followed by ongoing charter support and management of vessels on projects. The service also covers vessel audits and harbour dues and is provided in collaboration with sister company CSO Shipbrokers.
• Asset Ownership and Vessel Investment Provides advisory and consultancy services for vessel investment and asset ownership, including crewing logistics, commercial charter seeking and management, and technical oversight. The service supports clients from an initial vessel purchase through subsequent fleet management.

Quantifiable outcome

• Personnel mobilisation capability within 24 hours of request
• +2 more outcomes

Named customers2 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Four partnerships are on record, tiered core and minor.

• Crew Training SolutionscoreStrategic or Co-development Partner · 3 April 2024CSO Marine Group partnered with Crew Training Solutions in April 2024 to offer discounted seafarer courses to their network. This partnership provides training benefits to crew members sourced through Offshore Operations' manning services, enhancing the overall value proposition of their recruitment and crewing solutions.
• CSO ShipbrokerscoreStrategic or Co-development PartnerCSO Shipbrokers is a sister company within CSO Marine Group providing specialist renewables shipbrokerage services. Offshore Operations collaborates with CSO Shipbrokers to offer complete vessel charter and crew manning solutions, combining vessel sourcing with personnel provisioning for offshore wind projects.
• CSO EngineeringminorStrategic or Co-development PartnerCSO Engineering is a sister company within the CSO Marine Group offering marine engineering services. The companies operate under the same parent group and cross-refer clients requiring engineering expertise alongside operational and manning services.
• CSO Marine GroupcoreStrategic or Co-development PartnerCSO Marine Group is the parent company and umbrella brand for a dynamic maritime-focused group with strong heritage in brokerage, marine design, and operational support. Offshore Operations operates as a subsidiary providing manning, consultancy, agency, and ancillary services within the group structure.

Scale indicators6 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• ESVAGT: ESVAGT is a leading European SOV and offshore service vessel operator with in-house crewing capability; competes for the same offshore wind manning and vessel management contracts and sets a benchmark for integrated service delivery.
• CWind (Global Marine Group): CWind is a direct comparable, providing CTV operations, offshore wind vessel services, GWO training, and crewing support — directly overlapping with Offshore Operations' manning and consultancy offerings. Founder Josh Brennan previously headed operations at CWind.
• North Star Renewables: North Star operates a dedicated SOV fleet for the offshore wind sector and competes for similar vessel crewing, charter support, and operational services contracts as Offshore Operations.
• Worldwide Recruitment Solutions (WRS): WRS is a specialist maritime and offshore energy recruitment firm that competes directly with Offshore Operations for offshore wind crew placements and similar marine personnel contracts.
• Spinnaker Global: Spinnaker Global is a specialist offshore, maritime, and energy recruitment company providing crew placement and manning services directly comparable to Offshore Operations' recruitment offering.

Broad incumbents

• Cadeler: Cadeler is an established offshore wind installation vessel operator with broader scale and capital markets listing; overlaps with Offshore Operations in the offshore wind vessel ecosystem and indirectly competes for talent and consultancy work.
• Van Oord Offshore Wind: Van Oord is a major marine contractor with significant offshore wind installation and balance-of-plant operations; competes for skilled maritime crew and uses vessel inspection/management capabilities that overlap with Offshore Operations.
• Maersk Supply Service: Maersk Supply Service operates offshore support vessels and has expanded into offshore wind; competes for offshore wind crew and vessel management work and represents the broader OSV sector transitioning to renewables.
• Seaway 7: Seaway 7 provides offshore wind foundation and cable installation services and operates its own fleet; competes for vessel crewing and new build consultancy talent in the same offshore wind market.

Emerging players

• Vroon Offshore: Vroon Offshore operates subsea and offshore support vessels including those serving offshore wind; competes for vessel crewing and operational support work in adjacent offshore wind segments.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/offshore-operations

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Offshore Operations Limited