NEW YORK, September 14, 2026 — Marsh (NYSE: MRSH), a leading global professional services firm, today announced the appointment of Christos Adamantiadis as Global Head of Placement and Market Solutions, Marsh Risk, effective November 1, 2026. Mr. Adamantiadis will report to Nick Studer, CEO, Marsh Risk.
In this newly created role, Mr. Adamantiadis will lead Marsh Risk’s global placement and market solutions strategy, working closely with regional leaders and insurers globally to accelerate product innovation and ensure Marsh continues to design, structure, and place best-in-class insurance programs across markets, industries, and client segments.
Mr. Adamantiadis currently serves as CEO, Marsh Europe and President, Marsh Risk Europe. He joined the firm in 2018 as CEO of Marsh Risk’s Middle East and Africa region and was named CEO of its Continental Europe region in 2023 before being promoted to his current position. Prior to joining Marsh, he was CEO of UAE-based Oman Insurance Company for three years. Mr. Adamantiadis also spent 20 years at AIG in various country and regional management roles.
Marsh also announced that John Donnelly, President of Global Placement, will retire from the company early next year, after a distinguished 50-year career in the industry. He will continue to lead key global placement initiatives and support the transition.
Commenting on the changes, Mr. Studer said: “Christos is an outstanding leader with a proven ability to build teams, services, and capabilities across geographies that deliver value for clients. Under his leadership, I am confident that Marsh will continue to develop innovative, client-focused solutions that support their risk transfer needs and deliver the best possible outcomes. I also want to thank John, whose remarkable track record in international placement has advanced Marsh’s global placement strategy across retail and wholesale.”
Mr. Adamantiadis added: “I look forward to working with regional leaders and insurer partners around the world to strengthen market access and bring the full breadth of Marsh’s placement and product capabilities to clients. Together, we will continue to develop innovative solutions that help clients manage volatility, protect their balance sheets, and move forward with confidence.”
Marsh (NYSE: MRSH) is 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 marsh.com, or follow us on LinkedIn and X.
International Director of Media Relations, Marsh; Global Director of Media Relations, Marsh Risk & Marsh Re
