Studer will also become a vice chair of the firm and join the company’s executive committee.
In this role, he will lead all businesses across the group, including NERA, Lippincott and OW Actuarial, and continue serving as managing partner of Oliver Wyman’s management consulting business, a role he assumed earlier this year.
He will report to Dan Glaser, president and CEO of Marsh McLennan. Studer succeeds Scott McDonald, who has served as president of Oliver Wyman since 2012 and leaves the group after a 26-year career at the firm.
Glaser said: “Nick has led many of Oliver Wyman’s major practices in his 23 years with the business, and every one of them has been the better for his guidance. In addition to his work with clients, he has been a leading voice for change and a major driver of our Inclusion and Diversity agenda.
“His understanding of how to make businesses and people thrive will be indispensable as we build our enterprise’s shared future.”