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Business 100 - 2025

Fionnuala Delahunty

AON

Driven and highly effective Senior Account Executive and Managing Director at Aon, Fionnuala brings over 20 years of global experience in risk management, insurance, and client advisory. 

At Aon, Fionnuala leads the management of complex accounts and teams, delivering innovative solutions and driving growth across all business lines. Previously, as Director of Risk Management at Honeywell International, she designed and implemented global risk programs, managed multi-million-dollar insurance portfolios, and led enterprise-wide initiatives – including cyber, executive, and casualty risk. 

A recognized leader in strategic risk management and client partnership, with a proven track record at leading firms in both the US and Europe, Fionnuala, who was born in the US but moved to Ireland when she was 10, is known for building trusted C-suite relationships, mentoring future leaders, and aligning risk strategies with evolving business objectives. 

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