Huseyin Sahin

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+44 203 900 9846 direct

Previous Experience

  • Senior manager, Mazars LLP 

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Huseyin Sahin

Senior Principal

Huseyin assists clients with regulatory and risk management matters, with a focus on prudential regulatory issues in the United Kingdom.


Prior to joining Promontory, Huseyin worked for more than nine years at Mazars LLP, where he was responsible for managing audit and consulting projects in the banking industry. His experience includes managing s166 skilled-person reviews and advising firms on meeting regulatory requirements, including capital and liquidity management, governance, risk management, and controls against financial crime. Huseyin was workstream manager for three years on the monitoring-trustee project for a large U.K. banking state-aid case. He was also responsible for managing the external audits of U.K. banks and other financial services entities.


  • B.S., economics, University College London  

Affiliations, Awards, and Civic Engagements

  • Chartered accountant, ACA 

Representative Engagements

  • Served on a team that conducted s166 skilled-person reviews on suitability of customer advice at the U.K. subsidiary of a European financial firm and on conduct at a large U.K. bank.
  • Designed and delivered a briefing on U.K. regulations to the audit committee of a large international banking group.
  • Conducted a governance review within the wholesale-banking division of a large U.K. bank.
  • Advised a U.K. firm on its group and regulated-entity risk management framework.
  • Advised U.K. and international firms on preparing — and provided quality assurance for — documents related to their internal capital-adequacy assessment process, individual liquidity-adequacy assessments, and recovery and resolution plans.
  • Assisted financial services clients with applications for approved-persons roles, providing interview practice, document preparation, and training in the U.K. and EU regulatory regimes.
  • Prepared a regulatory review and report as part of a due-diligence exercise for a U.K. financial services firm.
  • Advised firms on the U.K.’s senior-managers and certification regimes, providing employee training, drafting clients' responses to the Prudential Regulation Authority and Financial Conduct Authority consultation papers, and reviewing documents like role descriptions and statements of responsibilities.
  • Designed and delivered client-assets training at a large U.K. bank.

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