The Singapore-based executive brings more than 14 years of underwriting and management experience across the energy and chemicals sectors to the expanded role.
The appointment marks Ishida's return to AIG after more than a decade, following leadership roles at Everest Insurance, Zurich and other global insurers.
The leadership change follows Markel's broader Asia-Pacific expansion strategy, including ambitions to nearly double its regional business over the next five years.
The promotion comes as Ocean Underwriting expands its liability business through a recently launched complex risks facility and additional underwriting hires.
With over 15 years of experience in health insurance, Singla is the latest in a series of hires by the insurer after it received its licence from IRDAI in July.
