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  • John Holder-Leak


John Holder-Leak, Manager

John Holder-Leak


BDO Advisory


John is a Manager within the Transformation and Change practice for C5 in Guernsey. 

John is a competent management and project professional with over 25 years’ experience in the financial service sector and has worked in a broad spectrum of roles across insurance, banking, and global charge & credit cards. John has worked with a diverse range of corporate clients in multiple jurisdictions and regulatory bodies both locally in the Channel Islands and overseas.

  • Level 5 Certificate in Leadership & Management
  • Management Development Programme accreditation
  • Project Management
  • Business Analysis
  • Process management and improvement