Denis Usher Joins Mazars in the US as Global SEC Practice Leader News provided by Share this article Share this article NEW YORK, March 16, 2021 /PRNewswire/ -- Mazars, a leading audit, tax, and advisory firm in the US, announced that Denis Usher, Global SEC Practice Leader, has relocated from Mazars in Singapore to join the New York office as a US Partner. In this new role, he will lead and further expand the National and Global SEC Practices. Victor Wahba, Chairman and CEO, commented, "We are very excited to have Denis join us here in the US. His multinational expertise covering a range of markets will provide our listed clients with valuable global perspective."