MSIG USA Appoints Oscar Aguilar as Head of Excess and Surplus Property
EmitenTrust.com NEW YORK, Sept. 29, 2026 /PRNewswire/ -- MSIG USA today announced the appointment of Oscar Aguilar as head of excess and surplus property. Aguilar brings more than two decades of underwriting and leadership experience in the property market, with deep expertise in E&S, shared and layered property, and complex commercial risks.
Aguilar joins MSIG USA from Liberty Mutual Insurance, where he most recently served as senior vice president and national manager of major accounts property, shared and layered. He previously led U.S. retail property for Liberty Mutual and spent six years at Ironshore Insurance, where he managed wholesale property across the Western and South Central regions.
Earlier in his career, Aguilar served as senior vice president at Brit Insurance, leading E&S property underwriting and support teams with responsibility for building a profitable portfolio, developing talent and advancing product capabilities. He also held underwriting and leadership roles at Maiden Reinsurance North America, GMAC RE, SRO Napa, St. Paul Companies and Sherwood Insurance. His experience spans retail and wholesale distribution, primary and excess property, facultative reinsurance, and middle-market and large commercial accounts.
"Oscar brings the depth of underwriting expertise and market perspective that are essential to building a differentiated E&S property business," said Peter McKenna, CEO of MSIG USA. "He has spent his career navigating complex property risks while building strong relationships across both the retail and wholesale markets. That combination of technical discipline, market knowledge and leadership will be important as we expand our capabilities and create a platform that brokers can rely on for expertise, responsiveness and thoughtful solutions."
As head of excess and surplus property, Aguilar will lead the strategy and development of MSIG USA's E&S property business, with a focus on disciplined underwriting, portfolio performance and sustainable growth. He will work closely with underwriting and distribution leadership to build capabilities that respond to the evolving needs of brokers and clients while leveraging data and technology to support more informed decision-making and efficient execution.
Aguilar holds an MBA and a Bachelor of Science in business administration from California Coast University.
About MSIG USA
MSIG USA is the marketing term used to refer to MSIG Holdings (U.S.A.), Inc. ("MSIGH"), its insurance subsidiaries, and their manager. MSIGH's insurers are Mitsui Sumitomo Insurance Company of America, Mitsui Sumitomo Insurance USA Inc., MSIG Specialty Insurance USA Inc. and MSIG Specialty Insurance America, Inc. The insurers are managed by Mitsui Sumitomo Marine Management (U.S.A.), Inc. MSIGH is a subsidiary of MS&AD Insurance Group Holdings, Inc., one of the world's top P&C carriers with a 350-year heritage, A+, Class 15 ratings, and a global reach that spans 48 countries and regions. MSIG USA brings the financial strength, underwriting expertise, exceptional claims management, global footprint, and innovation necessary to offer commercial insurance solutions that address the unique risks businesses face in today's market. Its nationwide network of professionals provides responsive and personalized service for clients and brokers. The U.S.-based insurance subsidiaries are admitted in all P&C lines in all 50 states, the District of Columbia, and Puerto Rico. Not all insurers do business in all jurisdictions. Actual coverage is subject to the language of the policies as issued. To learn more, visit www.msigusa.com.
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SOURCE MSIG USA