Miramar Group has appointed insurance industry veteran Donna Brierley as head of casualty for commercial, the Sydney-based managing general agent (MGA) announced on Wednesday.
Before joining Miramar, Brierley spent over a year at American International Group, most recently serving as a casualty underwriting manager for major accounts. Earlier in her career, she held roles at Zurich Insurance, Allianz, LV=, and Aviva.
“With more than 25 years’ experience in the insurance industry across Australia and the UK, including over 14 years specialising in liability underwriting, Donna brings extensive expertise in helping brokers navigate a broad range of casualty risks,” the MGA said on LinkedIn.
Her appointment follows a series of recent hires by Miramar Group in 2026. Earlier this year, the MGA named Kenny Thom head of financial lines for tailored risk and appointed Suki Chan and Sherman Chan to its commercial underwriting team.





