Mr Ian McDonald > Mayer Brown International LLP > London, England > Lawyer Profile

Mayer Brown International LLP
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Work Department



Ian McDonald is co-leader of Mayer Brown’s global Litigation & Dispute Resolution practice and a member of the firm’s global Cybersecurity & Data Privacy practice, based in London.

He acts for banks and funds, particularly in high value disputes relating to loan structures, structured finance and derivatives, many of which have cross-jurisdictional elements and often managing large teams and competing priorities. Most recently he has been part of a cross-office, cross-practice team advising a financial institution on a cybersecurity incident, including leading on litigation aspects in the UK. He has also advised on cases for financial institutions involving allegations of mis-selling, misconduct, misrepresentation, deceit, fraud, breach of duty, contractual interpretation and breach of transactional documentation, as well as on matters of enforcement, rectification and restitution. He is co-leader of the firm’s International Banking and Financial Litigation Action Group. Ian also acts for licensed insolvency practitioners, noteholders, lenders, creditors, directors and borrowers in contentious insolvency matters.


University of Cambridge, Jesus College

Lawyer Rankings

London > Dispute resolution > Banking litigation: investment and retail

(Hall of Fame)

Ian McDonaldMayer Brown International LLP

Mayer Brown International LLP‘s ‘exceedingly client-focused’ team has a broad, cross-jurisdictional practice, with experience handling disputes involving structured finance, FX, LIBOR cessation and cyber-crime. The team’s client base includes a number of prominent multinational banks, acting for both claimants and defendants. Group head Ian McDonald is praised as ‘charming, careful, reassuring and experienced’; other key figures in the team include Alistair Graham  , who has ‘masses of experience’ in this space, and Chris Chapman, who possesses a ‘keen eye for the client’s best interests’.

London > Dispute resolution > Commercial litigation: premium

Mayer Brown International LLP‘s commitment to growing its commercial litigation capabilities was illustrated by the firm’s hire of, in the eyes of one client,  ‘one of the best lawyers‘ in the market, Airlie Goodman, from Linklaters LLP in February 2022. This hire further strengthens the team’s proficiency in the financial and professional services sectors. Significant contractual, post-M&A and shareholder disputes are the firm’s mainstays. Ian McDonald, Miles Robinson and Mark Stefanini are some of the recommended senior practitioners.