Oliver Wyman appoints Helen Leis as Global Head of Leadership and Change

Oliver Wyman (MMC) appointed Helen Leis as Global Head of Leadership and Change on March 20, 2026, a newly created role to guide clients through uncertainty and complex transformations.

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NEW YORK--(BUSINESS WIRE)-- Oliver Wyman, a global leader in management consulting and a business of Marsh (NYSE: MRSH), today announced Helen Leis as Global Head of Leadership and Change, a newly created role focused on guiding clients through uncertainty and complex transformations. Ms. Leis will take on the position in addition to continuing as Co-Head of M&A Americas.

Organizations today are navigating a period of rapid and often unpredictable change – from new technologies and shifting economic conditions to evolving workforce expectations. In this environment, leaders must be able to adapt quickly, align their organizations around new priorities, and translate strategy into sustained action. Oliver Wyman’s Leadership and Change work helps organizations build the operating models and leadership skills needed to navigate this complexity and turn disruption into opportunity.

“This role is key to advancing the firm’s long-term efforts to embed transformative leadership and change management capabilities across all our work, driving greater alignment, collaboration and impact,” said Nick Studer, President and CEO of Oliver Wyman. “Helen brings an outstanding combination of expertise, leadership, and empathy to help clients overcome some of the toughest challenges in business."

Ms. Leis has more than 30 years of experience advising organizations on complex transformation, integration, and change programs across industries. In her new role, Ms. Leis will work across practices, assessing where leadership and change challenges are likely to arise and helping clients develop pragmatic strategies and tools to help them thrive.

“I’ve spent three decades working with leaders navigating mergers, crises, and cultural overhauls. Every transformation tests the limits of an organization – but it also tests the limits of its leadership,” says Ms. Leis. “The leaders who succeed aren’t those who avoid that tension, but those who use it to help their organizations grow. When that happens, change stops being disruptive, and starts becoming a source of strength."

About Oliver Wyman
Oliver Wyman is a business of Marsh (NYSE: MRSH), a global leader in risk, reinsurance and capital, people and investments, and management consulting, advising clients in 130 countries. With annual revenue of $27 billion and more than 95,000 colleagues, Marsh helps build the confidence to thrive through the power of perspective. For more information, visit oliverwyman.com, or follow us on LinkedIn and X.

View source version on businesswire.com: https://www.businesswire.com/news/home/20260320341495/en/

Media contact:
Danielle Arceneaux
+1 929 215 8732
Danielle.Arceneaux@oliverwyman.com

Source: Oliver Wyman

Key Terms

m&a financial

M&A, short for mergers and acquisitions, involves one company combining with or purchasing another company to grow, streamline operations, or gain competitive advantages. For investors, M&A activity can signal potential for increased value, new opportunities, or changes in market dynamics, making it an important factor to watch in the business landscape.

View in glossary

change management technical

Change management is the process of planning and guiding how organizations adapt to new methods, structures, or strategies. It involves helping people adjust smoothly to changes to minimize disruption and ensure successful implementation. For investors, effective change management can signal how well a company handles transitions, impacting its stability and future performance.