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Steven O'Sullivan

Senior Associate, London

Steven is an insurance litigator with substantial experience in professional liability, much of which was obtained in-house defending claims. Over recent years, he has widened his experience to include international arbitration, coverage, property damage, product liability and food safety.
Steven O'Sullivan | Senior Associate | DWF


He has over 20 years' post-qualification experience in civil and insurance litigation. Having for many years acted for solicitors or other professionals and their insurers to defend claims, he now focuses more on wider insurance work, with experience of arbitration, coverage, property damage (both defendant and claimant – recovery work for insurers), marine and product liability, including in relation to food.

In the early part of his career, he was a personal injury solicitor, particularly in relation to EL, PL and MIB claims.

Having gained some experience working temporarily in Australia, he subsequently spent a significant proportion of his career in-house, working for a market-leading insurer managing professional indemnity claims and the associated litigation. On returning to private practice, he has been acting for insurers to defend their professional insureds but then diversified into subrogated recoveries, mainly in relation to fire and flood, in contract and tort, together with other insurance litigation and arbitration, including disputes between insurers. 

As a result of his in-house exposure Steven has a keen appreciation of insurer's objectives to dispose of matters at minimum cost and ideally over as short a life-span as possible.

He regularly contributes articles to the New Law Journal, mainly in relation to professional liability. He is also the author of the Lexis Nexis practice notes for professional negligence claims together with several precedent letters of claim relating to damage recovery.

Steven is involved with the Waterloo Legal Advice Service providing voluntary legal advice to those who would struggle to fund it privately. His role is now a mentor to advisors, who deal with all kinds of matters but particularly employment, housing, family and consumer problems. He also enjoys football and hill walking.