Ms Sinead O’Callaghan > Cooke, Young & Keidan LLP > London, England > Lawyer Profile

Cooke, Young & Keidan LLP

Work Department

Dispute Resolution; Litigation; Banking Litigation; Civil:Fraud; International Arbitration; Partnership




Trained at Theodore Goddard; Associate at Addleshaw Goddard; Senior Associate at Mayer Brown International LLP; Senior Associate then Partner at Cooke, Young & Keidan LLP.


Sinead is a member of the Law Society of England and Wales, Financial Services Lawyers Associate, the Young International Arbitration Group and the Irish International Business Network


University of Bristol

Lawyer Rankings

London > Corporate and commercial > Financial services: contentious

Cooke, Young & Keidan LLP, a commercial and financial disputes boutique, is known for handling contentious financial regulatory work, acting for corporates and regulated firms in FCA investigations and disputes, as well as advising on supervisory and enforcement issues. Key contacts are Stephen Elam, an expert in financial products, and Sinead O’Callaghan, whose clients include funds and high-net-worth individuals. In March 2020, founding partner Marc Keidan left to start Keidan Harrison.

London > Insurance > Professional negligence

Cooke, Young & Keidan LLP advises on complex, high value claims against bankers, financial service providers, accountants and architects. Sinead O’Callaghan is skilled in commercial litigation, and has experience handling claims against real estate valuers and financial institutions. Stephen Elam acts for both claimants and defendants in professional negligence mandates involving financial services and banking professionals. Marc Keidan departed to establish Keidan Harrison LLP in 2020.

London > Dispute resolution > Commercial litigation: premium

(Leading individuals)

Sinead O’CallaghanCooke, Young & Keidan LLP

Praised for its ‘highly innovative thinking‘, litigation boutique Cooke, Young & Keidan LLP is particularly popular among high net worth individuals, SMEs,  as well as, increasingly, corporates and investment companies. ‘Brilliant strategic thinkerPhilip Young is a key contact for claims requiring urgent injunctive relief while Sinead O’Callaghan and the ‘gutsy and straight-talkingLydia Danon have broad practices. Stephen Elam has a specialism in financial services and regulatory disputes. It continues to build its technology practice, particularly in fintech and venture capital-related disputes. Arish Bharucha joined Howard Kennedy LLP.

London > Dispute resolution > Banking litigation: investment and retail

(Leading individuals)

Sinead O’CallaghanCooke, Young & Keidan LLP

Praised for its ‘highly innovative thinking‘, litigation boutique Cooke, Young & Keidan LLP is a popular choice for claimants against banks and other financial institutions and counts fintech disputes among its areas of growth. The ‘brilliant strategic thinkerPhilip Young, the ‘simply brilliantSinead O’Callaghan and Lydia Danon have broad litigation experience. ‘Great strategistStephen Elam is particularly strong for claims involving complex financial products while Daniel Burbeary excels in cross-border disputes involving China, Russia and the CIS region. ‘Emerging starSam Roberts and Rosie Wild are among the associates to note.

London > Dispute resolution > International arbitration

Cooke, Young & Keidan LLP specialises in commercial and financial disputes, with key growth areas for the boutique firm including commercial arbitrations, enforcement of awards, and bringing and defending challenges to awards; it is also increasingly active on the claimant side in investor-state disputes. Daniel Burbeary specialises in commercial disputes, particularly those involving China, Russia and former CIS countries; Sinead O’Callaghan is gaining a significant profile in arbitrations; and Philip Young has over 25 years’ experience in the field.