Niall O’Sullivan
Investment consultant Mercer announced Monday the appointment of Niall O’Sullivan as its global CIO, weeks after naming CIOs for multiple geographies and business units.
O’Sullivan’s appointment is effective May 1, and he will succeed Hooman Kaveh, who will move into the newly created role of executive chair for Mercer’s investment platform. Both O’Sullivan and Kaveh will report to Mercer President for Investments and Retirement Michael Dempsey.
“Niall’s deep knowledge of our investment business, passion for achieving strong investment outcomes for our clients, and ability to foster high-performing teams will position us strongly for the future,” Dempsey said in a statement. “Continuing to work together, both Niall and Hooman will help accelerate the integration of our expanding investment capabilities, scale our differentiated offerings, and deliver consistent, impactful outcomes for our clients.”
Earlier this month, Mercer named Andrew McDougall as CIO for the U.S. and Garvan McCarthy as global alternatives CIO, in addition to his role as EMEA and Asia CIO, until a successor is identified for either or both of those regional roles.
O’Sullivan has served as CIO for global solutions at Mercer since 2024. He previously worked as Neuberger’s CIO for multi-asset strategies, EMEA, and as CIO for Mercer Global Investments Europe from 2010 to 2022.
He earned a bachelor of arts degree in mathematics from Trinity College Dublin and a master’s degree in investments and securities from Dublin City University.
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Tags: Mercer