What Longitude Engineering does

Longitude Engineering is an independent design and engineering consultancy specialising in marine, offshore, and energy markets, founded in 2006 and operating as a wholly-owned subsidiary of Oslo-listed ABL Group ASA. The company delivers project-based engineering services across four primary service lines: Facilities & Subsea Engineering (covering field development, brownfield modifications, asset integrity, decarbonisation, life extension, and decommissioning), Marine Operations Engineering (mobilisation, marine transportation, installation, moorings/cables/umbilicals, metocean assessment, and rigs), Offshore Wind (WTG and substation foundation design plus submarine power cable engineering), and Ship Design (newbuilds, conversions, retrofits, and through-life support). Headquartered in Exeter, UK, with regional hubs in Singapore, Halifax, Rio de Janeiro, Southampton, Oslo, and Kuala Lumpur, Longitude serves enterprise clients including oil & gas operators (Shell's Burullus Gas, Yinson, BW Offshore), offshore wind developers, and vessel owners/shipbuilders across 15+ countries.

The company's core technology stack includes industry-standard engineering software (SACS for structural design, FEMAP for finite element analysis, and Orcaflex for marine operations simulation), augmented by proprietary automation tools for cable installation analysis. Its product portfolio includes the IMT Isca PSV series (G-Flex launched September 2024, D-Flex launched February 2026), a next-generation platform supply vessel family evolved from the proven IMT-984 G-Class series, and Proper Live Load (PLL), a real-time FPSO mooring line tension monitoring system with predictive analytics and machine learning capabilities launched in June 2026 with an initial contract from a South American oil & gas operator. The firm has built a track record of 3,800+ completed projects and a portfolio of 140 ship designs, with capabilities expanded through the 2021 acquisition of OSD-IMT (vessel design), the January 2025 acquisition of Brazil's Proper Marine (rebranded as Longitude Brazil in December 2025), and the announced May 2026 acquisition of Malaysia-based SynergenOG (process safety and risk management).

Longitude generates revenue primarily through project-based professional services contracts (concept, FEED, detailed design, and through-life support) with enterprise clients, supplemented by emerging recurring revenue from digital products such as PLL. Pricing is quote-based and determined by project scope, complexity, and duration. The go-to-market is direct enterprise engagement via regional directors covering Europe/Middle East/Africa, Asia Pacific, North America, and South America, with cross-leverage from ABL Group's wider network of 40+ countries. Customer acquisition is supported through the corporate website, industry conferences (e.g., EGYPES in Egypt, Energy Taiwan), and an active content marketing programme.

Name

Longitude Engineering

Legal name

Longitude Engineering

Website

https://longitude-engineering.com

Company type

Private

Founded year

2006

Operating status

Operating

Headcount range

51–100 employees

Short description

Longitude Engineering is an independent design and engineering consultancy serving oil & gas operators, offshore wind developers, and vessel owners globally. It delivers project-based specialist engineering across facilities & subsea, marine operations, offshore wind, and ship design via 200+ engineers in 15+ countries.

Ownership category

akta.pro rank

Product category

Offshore Engineering Consultancy

NAICS

Engineering Services (541330), Architectural, Engineering, and Related Services (5413), Power and Communication Line and Related Structures Construction (237130), Other Specialized Design Services (54149)

SIC

Services-Engineering Services (8711), Oil & Gas Field Services, Nec (1389), Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Project Management & Owner’s Engineering / Technical Consultancy (Spec Writing, Bid Support, Site Support) (IMAJAGAO)

akta.pro secondary industries

Navigation, Communications & Integrated Bridge Systems Engineering (IMAJAGAH), Offshore Wind & Renewable Support Vessel Construction (SOV, CTV, WTIV) (IMAJACAG), Marine & Offshore Energy O&M (Offshore Wind, Platforms, Subsea Assets) (EUAEAGAO), Engineering design services (line design, substation design, civil/structural) (EUADAKAG), Geotechnical & Subsurface Engineering Consulting (BPAHAIAB)

Keywords

• Marine engineering consultancy
• Offshore wind design
• Subsea engineering
• FPSO conversion engineering
• Ship design services

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices7 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations

Revenue model

1. Engineering Consultancy Services: Project-based engineering and design services across facilities & subsea, marine operations, offshore wind, and ship design. Revenue generated through direct client contracts for concept, FEED, detailed design, and through-life support services.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Longitude Engineering is an independent, multi-disciplined design and engineering consultancy serving the marine, offshore energy, and renewables sectors. The firm delivers specialist engineering services across four service lines: Facilities & Subsea Engineering, Marine Operations Engineering, Offshore Wind Foundation Design, and Ship Design Services. It also develops proprietary vessel designs (IMT Isca PSV series) and digital monitoring tools such as the Proper Live Load (PLL) mooring line tension monitoring system.

Product overview

Longitude Engineering is a global design and engineering consultancy providing independent, multi-disciplined expertise across renewables, maritime, and oil & gas sectors since 2006. The company operates four primary service lines: Facilities & Subsea Engineering, Marine Operations Engineering, Offshore Wind Foundation Design, and Ship Design Services. The Ship Design portfolio includes the proprietary IMT Isca PSV series (G-Flex and D-Flex models) representing next-generation platform supply vessels evolved from the proven IMT-984 G-Class series. In the digital products space, Longitude has developed Proper Live Load (PLL) - a real-time mooring line monitoring system with predictive analytics and machine learning capabilities for FPSO operations. The company also acquired SynergenOG, bringing proprietary process safety and risk management software solutions including the ePSM e-learning platform. All services are delivered through more than 15 country offices across Europe, Middle East, Africa, Americas, and Asia Pacific, as part of Oslo-listed ABL Group ASA.

Differentiator

Problem solved

Functional benefit

Brands

• Proper Live Load (PLL): A real-time mooring line tension monitoring system for FPSO operations, developed by Longitude to continuously monitor the tension of mooring lines on floating offshore units.
• IMT-Isca

Products and services

• IMT Isca PSV Series Next-generation platform supply vessel design series evolved from the proven IMT-984 G-Class, focused on efficiency, low-fuel consumption, and operational flexibility. Designed for offshore energy operators requiring PSV newbuilds.
• IMT Isca G-Flex PSV First design in the IMT Isca PSV series, featuring 83.95m length overall, 18m beam, 810 sqm deck area, DP Class 2 capability, multi-thruster configurations, and accommodation for 24 crew plus 12 passengers. Designed for offshore operators seeking low-fuel PSV solutions.
• IMT Isca D-Flex PSV Compact, cost-efficient addition to the IMT Isca series measuring 74.7m length overall with 3,000 tonnes deadweight and 650 sqm deck area, designed for offshore energy operations in Asia, Middle East, West Africa, and Southern North Sea with flexible owner-configured layouts and alternative fuel preparation.
• Proper Live Load (PLL) Real-time mooring line tension monitoring system for FPSO operations that continuously monitors vessel position, mooring line tension, and 6-degree-of-freedom vessel motion using geo positioning sensors and calibrated mooring analysis models with predictive analytics and machine learning capabilities.
• SynergenOG Process Safety Software Proprietary process safety and technical risk management software solutions developed by SynergenOG, including the ePSM e-learning platform co-developed with sister company ABL for asset integrity management practices. Brought in via the SynergenOG acquisition.
• Facilities & Subsea Engineering Full design and engineering capability supporting facilities and subsea infrastructure throughout the asset lifecycle, spanning front-end activities through to decommissioning. Covers field development, brownfield modifications, asset integrity & reliability, decarbonisation, life extension, and decommissioning for oil & gas operators.
• Marine Operations Engineering Comprehensive marine operations engineering services including mobilisation engineering, marine transportation engineering, installation engineering, moorings/cables/umbilicals, metocean route/site assessment, and rigs engineering for offshore operators and EPC contractors.
• Offshore Wind Foundation Design Specialist offshore wind foundation design services from concept through FEED to detailed design, covering bottom-fixed wind turbine generator (WTG) foundation design, substation foundation design, and integration with marine operations capabilities for offshore wind developers.
• Ship Design Services End-to-end ship design services covering newbuilds, conversions, upgrades, and retrofits. Includes clean shipping design, offshore vessels, research vessels, small craft, and through-life support. Enhanced by OSD-IMT acquisition (2021) with extensive vessel design track record.
• Submarine Power Cable Engineering Design and engineering services for subsea cables including cable routing, risk assessment, burial analysis, and installation procedures using Orcaflex simulation software. Covers site characterisation, route assessment, infrastructure crossing design, and post-lay protection analysis for offshore wind projects.

Quantifiable outcome

• 3,800+ projects completed
• +1 more outcomes

Named customers8 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature2 records

Partnerships

Nine partnerships are on record, tiered core and minor.

• SynergenOGcoreStrategic or Co-development Partner · 13 May 2026Malaysia-based process safety and technical risk management consultancy with 45 consultants. Upon acquisition completion, SynergenOG will be integrated with Longitude to strengthen the engineering offering across all business lines, creating a technical center of excellence in process safety and risk management.
• Sinotech Engineering ConsultantscoreStrategic or Co-development PartnerTaiwanese engineering consultancy with strong in-country track record. MoU signed to collaborate on offshore wind design and marine operations engineering in-country and for the wider Asia Pacific region, supporting Taiwan's 15.5 GW offshore wind target by 2035.
• PetroSafecoreStrategic or Co-development PartnerEgypt's Petroleum Safety and Environmental Services Company. MoU for collaboration on technical solutions to drive performance in Egyptian energy assets, offshore and onshore. Longitude provides training in process safety management and asset integrity fundamentals.
• ABL GroupcoreStrategic or Co-development PartnerOslo-listed global consultancy group and parent company of Longitude. Longitude is the design and engineering arm of ABL Group, with access to sister companies ABL (energy and marine consultants), AGR (technical advisory), and OWC (renewable energy specialists).
• OSD-IMTcoreStrategic or Co-development PartnerAcquired vessel design house contributing PSV experience. Combined with Longitude's naval architecture and ABL's marine operational expertise to deliver the IMT-Isca PSV series.
• Proper MarinecoreStrategic or Co-development PartnerBrazilian naval architecture and engineering consultancy acquired by Longitude and rebranded as Longitude Brazil in December 2025. Doubled global technical capacity and expanded presence in South America.
• ABLcoreStrategic or Co-development PartnerEnergy and marine consultants, sister company within ABL Group. Supports Longitude with local marine surveying expertise (e.g., ABL Egypt for West Delta Deep Marine projects) and broader technical capabilities.
• OWCminorStrategic or Co-development PartnerRenewable energy specialists and sister company within ABL Group. Collaborates with Longitude on offshore wind projects including foundation design and substation engineering.
• AGRminorStrategic or Co-development PartnerTechnical advisory and owners engineering consultancy, sister company within ABL Group. Provides support for grid-scale development of renewable energy onshore and offshore.

Scale indicators5 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Worley: Global engineering and professional services firm delivering projects across offshore oil & gas, offshore wind, and energy transition. Overlaps directly with Longitude in subsea, FPSO, and offshore wind foundation design, but at a far larger scale and broader EPC footprint.
• Saipem: Italian-headquartered engineering and offshore construction company active in FPSO, subsea, and offshore wind. Overlaps with Longitude on FPSO conversion and offshore installation engineering design work.
• Aker Solutions: Norwegian-headquartered engineering and EPC firm specializing in offshore oil & gas and offshore wind. Direct competitor for North Sea FPSO and offshore wind foundation engineering work that Longitude pursues from its Oslo office.
• McDermott International: Offshore engineering and construction contractor active in subsea, SURF, and FPSO projects. Competes with Longitude on FPSO conversion engineering scopes and offshore installation design in the Americas and APAC.
• Subsea 7: Global subsea engineering, construction, and services contractor for the offshore energy industry. Competes with Longitude in marine operations engineering, cable and umbilical installation engineering, and SURF project scopes.
• Wood Group: Major international engineering consultancy with deep offshore oil & gas and offshore wind engineering capabilities, including structural design and subsea engineering. Competes with Longitude for the same IOC/NOC project scopes while operating at much larger scale.
• TechnipFMC: Integrated subsea and offshore engineering, procurement, and construction company serving the FPSO and subsea tieback markets. Competes directly with Longitude on FPSO conversion and subsea development engineering projects.

Others

• ABL Group: Oslo-listed parent of Longitude Engineering and operator sister companies ABL (marine consultants), AGR, and OWC. Functions as the strategic platform that channels work to Longitude and provides global reach, making it adjacent rather than a market competitor.

Direct peers

• COWI: Danish engineering consultancy with strong offshore wind foundation design and marine structural engineering capabilities. Competes with Longitude for offshore wind foundation FEED and detailed design mandates globally.
• Wood Thilsted Partners: Specialist offshore wind structural engineering consultancy focused on wind turbine generator foundation design. The closest like-for-like competitor to Longitude's offshore wind foundation design practice, particularly in monopile and jacket design for European and APAC projects.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/longitude-engineering

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

Subsidiaries3 records

Funding overview

Funding rounds

Investors

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

M&A1 record

Investments

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

Frequently asked questions about Longitude Engineering