About Us

Since 2006, Longitude Engineering has delivered specialist design and engineering services in the marine, offshore renewables, oil & gas, defence, and offshore infrastructure markets. Our independence, expertise and experience make us a natural choice for a wide range of design solutions across Asia Pacific, Europe and North America.

About Longitude

Our Business

Longitude Engineering is dedicated to providing marine design and analysis services to the marine, offshore renewables and oil & gas, defence and small craft market sectors. Our aim is to provide field operators, installation contractors, vessel owners and others involved in the industry with all the maritime engineering assistance they require to ensure their projects are successful.

Our People

We are staffed by naval architects, structural engineers, designers, hydrodynamicists, geotechnical specialists, metocean and coastal engineers, mechanical engineers and marine engineers, all with extensive and broad experience of the offshore renewables and oil & gas, marine, defence and small craft industries gained whilst working in various roles across the maritime industry.

Our Guiding Principles

We consider our most important assets to be our people, our independence and our reputation.

We take a holistic view of design from the overall concept through to the smallest detail – rather than simply focusing on a craft or platform, we are dedicated to helping your marine project succeed. This client-focused perspective, combined with our agile responsiveness and ability to adapt the way we work to suit you, is what makes us unique.

Our Organisations


Longitude Engineering, part of the AqualisBraemar LOC Group was incorporated in 2006 to provide dedicated independent engineering and design consultancy to the shipping, oil & gas and renewables sectors.

Longitude provides these services through offices located in six worldwide locations and utilising the wider network of AqualisBraemar LOC spanning over 60 offices and 39 countries.

Consulting and engineering services are provided by Longitude for all marine structures but with a particular focus on the construction, transportation and installation phases of an offshore project. For floating and fixed structures these services are provided for the whole lifecycle, from concept to operations, life extension and decommissioning.


LOC is the premier international marine and engineering consulting firm – part of the AqualisBraemar LOC Group.

LOC operates in the shipping, oil & gas and renewables sectors, providing predominantly loss prevention (marine warranty, surveys, inspections & audits, technical due diligence), loss management (marine casualties, claims, disputes and litigation) and marine and engineering consultancy services. Our clients comprise P&I clubs, H&M insurers, underwriters, brokers, oil and gas companies, energy utilities, field operators, developers, EPC contractors, installation contractors, drilling contractors, lawyers, shipowners, governments, and turbine and cable OEMs.

John LeBourhis

John LeBourhis, acquired by LOC in 2017, was established in Houston, Texas in 1976 to provide high quality marine consultancy and survey services to the offshore oil and gas industry, and in particular those activities associated with the marine loss prevention aspects of offshore construction, drilling and production operations.

From the headoffice located in Houston, John LeBourhis delivers rig approval services around the globe often utilising the AqualisBraemar LOC Group companies network of over 60 offices worldwide.


Innosea, acquired by LOC in 2018, is an independent engineering firm specialising in offshore renewables.

Established as a technology spinout from the Ecoles Centrale de Nantes, Innosea continues to work at the cutting edge of research and development in marine renewables.

Innosea provides consulting and engineering services to marine renewables industry with a particular focus on fixed and floating substructure concept development and engineering, and turbine engineering and analysis.


AqualisBraemar ASA is a public listed company that, through its subsidiaries and associates, offers adjusting, marine, offshore and renewables consultancy services to the energy, shipping and insurance industries. The group employs specialist engineers, naval architects, master mariners, loss adjusters and technical consultants in 48 offices located across 33 countries.


Founded in 2011, OWC is a specialised and globally focussed technical advisor, engineering and project management consultancy providing independent services to the offshore wind industry, having worked on projects amounting to 68 GW across Europe, Asia and the US.