Olivier Delsupexhe

Photo Olivier Delsupexhe (IMG_4834bis)

Olivier Delsupexhe

Partner

Expertise

International arbitration
Construction law
IT disputes
Industrial risk, maritime and transport

Practice areas

Infrastructure works and major projects
Energy, logistics and transport
Information technologies
Bank, finance and (re)insurance

Experience

Olivier Delsupexhe has made complexity his specialty. Rather than confining himself to a single sector, he masters the common grammar of large-scale projects (interlocking contractual structures, multiple stakeholders, technical and financial uncertainty, exposure to risk), which allows him to act with the same gravity in construction and engineering, in energy (onshore and offshore, renewable and nuclear), in information technology, in shipping and international trade, as well as in (re)insurance and industrial risk management.

Olivier Delsupexhe applies one and the same discipline to technical worlds that are very different yet convergent. For his public and private clients alike, he handles the complex projects and the disputes they generate: structuring and negotiating contractual arrangements, an in-depth command of IT, engineering and construction contracts (FIDIC and others), risk allocation, and the conduct of claims and international arbitration (Best Lawyers 2026/2027). His work spans upstream advice – such as the design-build of data centers – through to defending his clients' interests in both pre-litigation and litigation.

It is this cross-cutting approach – one and the same discipline applied to different technical worlds – that gives his advisory work and his litigation practice their value.

Highlights

Olivier has recently advised:

Civil engineering contractors for the design/build of offshore windfarms and that of new nuclear facilities
A public international organization for the resolution of a dispute against a general contractor on the design/build of a highly secured data center
An industrial engineering company for the resolution of a dispute on the design/build of a chemical plant
A worldwide software company for the resolution of disputes over the deployment of IT projects
A public international organization against the consortium of IT service providers for the procurement of a very large-scale infrastructure
A reinsurance company for the risk assessment of the cedants’ exposure to Covid-19
Shipowners and cargo interests for the resolution of their commercial disputes

Olivier has also advised:

An international joint-venture of engineering companies over the performance of engineering contracts governing an LNG plant and a transborder tunnel
An international consortium of engineering companies in relation to the performance of the civil engineering contracts governing a nuclear large-scale scientific experiment
A public entity in relation to the negotiation and drafting of an international contract for logistic services concerning exceptional loads to be shipped to a nuclear plant
A reinsurance company in the resolution of a massive dispute against a cedant specializing in the coverage of medical risks