Markel appoints Collin Sim as Casualty Underwriter in Singapore

Published on June 27, 2025

Markel Insurance, the insurance arm of Markel Group Inc., has announced the appointment of Collin Sim as Casualty Underwriter.

MarkelThe hire marks the establishment of Markel’s first dedicated casualty underwriting position in Singapore.

In her new role, Sim will be responsible for developing Markel’s casualty presence in Southeast Asia and the broader Asian market. She will focus on building and maintaining strategic relationships with brokers and clients, while managing a portfolio of risks aligned with Markel’s underwriting principles.

Sim brings over 20 years of casualty underwriting experience in Asia. She most recently served as Assistant Vice President of General Casualty at Allied World, where she managed general casualty direct and facultative business across Southeast Asian markets.

Previously, she spent nearly 17 years at Gen Re, where she was Casualty Facultative Manager. In that role, she played a key part in developing facultative casualty portfolios across multiple Asian markets, including Singapore, Malaysia, Brunei, and China.

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Wanshi Lin, Head of Singapore, said, “We are delighted to welcome Collin to Markel. Her extensive experience and deep understanding of the Asian casualty market will be invaluable as we continue to expand our presence in the region. This strategic appointment demonstrates our commitment to building strong underwriting capabilities and delivering exceptional service to our clients and partners across Asia Pacific.”

Christian Stobbs, Managing Director – Asia Pacific, added, “Collin’s appointment represents a significant milestone in our regional growth strategy. Her proven track record in developing profitable casualty portfolios and her deep relationships across the Asian insurance market make her the ideal candidate to establish and grow our casualty practice in Singapore.”

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