John advises on policy coverage issues for both primary and excess layer insurers in respect of national and international risks, including Bermuda Form, ad hoc and LCIA arbitrations.
He acts for insurers and insureds in public and product liability claims including medical device and pharmaceutical claims, clinical trials, property losses, cyber and D&O liabilities.
He is currently advising London excess market insurers on coverage issues arising from multiple law suits filed by state, county, municipal and Native American governments against US opioid manufacturers and wholesale distributors.
John is included in the 2022 Legal 500 'Hall of Fame' for Insurance/Reinsurance litigation, which states ‘John Groome has been a long term contact within the organisation, his pragmatic and practical approach to resolving disputes is excellent. His ability to refer appropriate matters to a team of lawyers with multijurisdictional abilities is of particular benefit.’
He is also ranked in the 2022 Chambers and Partners Guide for Insurance: Contentious Claims & Reinsurance, which states "John has great technical skills as well as a manner which puts clients at ease."