Trevor Stewart

Trevor Stewart, a retired Deloitte Principal, has an extensive career in audit innovation and technology. Starting in Johannesburg and later working in London and New York, he founded Deloitte’s first computer audit practice and led the global Audit Technology R&D Center, developing the firm’s integrated audit software platform. Trevor pioneered regression analysis for audit procedures, co-authored a Wiley book on the topic, and contributed to key AICPA guides on audit sampling, data analytics, and continuous auditing. Before retiring, he served on Deloitte’s international technical policy team. Post-retirement, he earned a PhD from VU University Amsterdam on Bayesian audit assurance, publishing influential research on component materiality. A Chartered Accountant with a mathematics background, Trevor continues advancing Bayesian methods in auditing and sampling.