Marian heads Sullivan’s UK insurance and disputes practices, working closely with the firm’s established and multi-disciplinary trade and export finance team, and the firm’s U.S.-based disputes team, providing advice on commercial dispute resolution, insurance and risk management.

With over 30  years' experience, Marian’s contentious experience includes advising clients in relation to disputes arising from trade finance, professional negligence, commercial insurance and breach of contract claims. These disputes are often international in nature and result in large-scale, highly complex multi-party litigation, arbitrations and mediations.

Marian advises banks, insurance brokers, investment funds, government agencies and corporates in relation to their commercial insurance arrangements which support structured trade, commodity and pre-export financings as well as corporate finance, energy, property, M&A and outsourcing transactions.

She advises on the management of insurance claims and subrogation actions and issues arising from the restructuring of insured loans. She also drafts and interprets insurance policies and advises on the use of insurance by credit institutions and investments firms as credit risk mitigation for capital adequacy purposes under the UK’s Capital Requirements Regulation and the EU’s equivalent capital requirements regimes. Marian’s contentious experience informs her approach to policy drafting and eligibility of insurance for use as credit risk mitigation.

Marian was recognized in the 2023 Edition of Best Lawyers, United Kingdom for her work in insurance law.

Bar & Court Admissions

  • Solicitor, Senior Courts of England and Wales


  • University of Wales

Awards & Honors

  • Best Lawyers in the United Kingdom, Insurance Law (2023)
  • The Legal 500 UK, Dispute Resolution-Commercial Litigation – Recommended (2017-2021)

Seminars & Presentations


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