Global insurance broker Marsh McLennan has announced senior leadership changes at Marsh, appointing Nick Studer as president and CEO of Marsh Risk and naming Martin South as the firm’s new chief client officer. The changes take effect April 1.
Studer will succeed South in leading Marsh Risk, while South will transition into an enterprise-wide role focused on strengthening client relationships across the company’s businesses. Both executives remain members of Marsh’s executive committee and report to Marsh president and CEO John Doyle.
Doyle said: “Our vision is to make Marsh the most impactful professional services firm in the world. These appointments will help us accelerate growth, increase our agility, unlock additional value for our clients, and realise our vision.”
Studer joins Marsh Risk from Oliver Wyman, the management consulting arm of Marsh McLennan, where he served as president and CEO since 2021. He first joined Oliver Wyman in 1997 and has held senior consulting roles across consumer, industrial, and financial services practices.
“I am honoured to lead Marsh Risk and delighted to be carrying forward our mission to grow a paradigm-shifting risk advisor, all-connected risk intermediary, and passionate advocate for our clients,” Studer said. He added that Marsh’s investments in data, analytics, and artificial intelligence will be central to enhancing client experience and managing complex risks.
South, who led Marsh Risk since 2022, will now serve as chief client officer. In the role, he will work across Marsh’s businesses to deepen client relationships, integrate capabilities, and apply AI and emerging technologies to improve client experience.
“A touchstone of Marsh, across all our businesses, is that we put clients at the centre of everything we do,” South said. “With the power and breadth of our expertise and a keen understanding of our clients’ needs, we can serve them like no other professional services firm.”
Marsh operates in more than 130 countries, providing insurance broking, risk advisory, analytics, and consulting services to corporations, governments, and institutions across a wide range of industries. The firm is part of Marsh McLennan, alongside Oliver Wyman, Mercer, and Guy Carpenter.
The company plans to announce a new CEO for Oliver Wyman and Marsh Management Consulting before April 1.






