She specialises in providing audit and assurance services to financial services clients, including banks, fiduciaries and a wide range of entities within the asset and wealth management sector. 

The firm said Ms Dietrich has worked closely with numerous regulated entities in Jersey and has extensive experience in auditing UK companies and exchange-listed organisations, making her a valuable addition to the team. 

Wynand Pretorius, Partner and Head of Audit at Grant Thornton Channel Islands, said: “We are delighted to welcome Mariane Nifas Dietrich as an Audit Director at Grant Thornton Channel Islands.

“We look forward to the additional value Mariane will bring to our team and our client proposition.” 

Ms Dietrich added: “I’m excited to join Grant Thornton, one of the Channel Islands’ leading independent assurance, tax and advisory firms.

“I look forward to collaborating with clients, understanding their needs, and delivering tailored solutions to address their challenges.”