Denis Usher Partner, Global SEC Practice Leader

Denis Usher

Denis has over 30 years of experience providing audit and assurance services to multinational groups, specializing in SOX 404 implementation and US GAAP/GAAS projects. His unique blend of US and international experience along with his experience in auditing in the SEC environment provides clients with a valuable global perspective.

Denis’s expertise includes audit, accounting research and SEC services across Europe, Asia and the United States.

Prior to joining Mazars in the US, he was the Managing Partner of Mazars Singapore and the head of the Mazars US Desk and the regional training campus in Asia Pacific.

Previously, Denis held roles at both Big 4 and large regional accounting firms in the US.

Denis holds a BS in accountancy from the University of Nevada, Las Vegas and an EMBA from Mazars NextMBA. He is fluent in English and French.

Industry Expertise

Public Companies/SEC

Multinational Groups

Service Specialties


SOX 404

Licenses & Certifications

Certified Public Accountant, California (CPA)
Chartered Accountant, Singapore

Fellow Certified Public Accountant, Australia


American Institute of Certified Public Accountants

Institute of Singapore Chartered Accountants (ISCA)