Olivier specialises in international commercial litigation and arbitration, focusing mainly on dispute resolution arising in insurance/reinsurance (coverage, property, professional indemnity, brokers' liability, subrogated claims in particular) and industrial risk (manufacturers' and operators' liability). He also has considerable experience in shipping and transport disputes. He has dual nationality, is dual-qualified in French and English law and is bilingual in French and English.

Olivier is recommended by Chambers and Partners and Legal 500 EMEA for both insurance and shipping work in France. Sources praise the way in which he "conveys technical facts in an easy comprehensible way" and that he "also understands the peculiarities of working in foreign jurisdictions" (Chambers Europe).