G.A. (Gert) van der Leest RA

A new standard for quality in accounting

Gert van der Leest boasts an impressive career in accounting. For many years, he served as a partner at one of the ' “Big 4” firms, working across offices throughout the Netherlands and in Aruba. His client portfolio included industrial companies, trading firms, service providers, and small listed businesses. In recent years, he has focused on the implementation of ISQM1, a new standard for the quality management systems of accountancy firms.

“When I retired from the ' “Big 4” firm in 2021 at the age of sixty, I encountered De Jong & Laan. There, I carried out various quality reviews (OKB) and continued my work on ISQM1. In addition, I dedicated part of my time to teaching at the University of Groningen.”

Since February 2025, Gert has been affiliated with the Compliance Office, where he concentrates primarily on the implementation of ISQM1.