We have new hires and promotions to tell you about at Liberty Mutual, Validus Re, Willis and Markel International:

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Liberty Mutual Insurance has a new executive vice president and general manager of its National Insurance Casualty unit.

In her new role, Debbie Michel will oversee the underwriting, sales and service of casualty insurance products for the large risk market. At the same time, she’ll continue to serve as president of Helmsman Management Services, Liberty Mutual’s wholly owned third-party administrator. Liberty Mutual credits Michel with growing Helmsman into the fifth-largest multiline third-party administrator based on total gross revenue.

Michel is a 20-year Liberty Mutual veteran and has held leadership positions in various underwriting, distribution, accounting, marketing and claim operations within Liberty Mutual’s Commercial Insurance strategic business unit.

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Validus Re, the reinsurance arm of Validus Holdings Ltd., appointed Jorge Beltran as executive vice president, head of treaty of Validus Reaseguros Inc.

In his new role, Beltran will be in charge of implementing and executing Validus Re’s treaty strategy in Latin America.

Beltran joined Validus Reaseguros in Miami in 2007. Prior to that, he held various executive or leadership positions over his career at companies including Liberty Mutual, SCOR, Swiss Re and Transatlantic.

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Nicholas Aubert is the new CEO of Willis Limited, the Willis Group’s principal U.K.-regulated entity.

Aubert’s new job is to handle responsibility for leadership, governance and regulatory issues for Willis Limited, which encompasses Willis Group’s U.K. insurance and reinsurance businesses.

Meanwhile, Aubert will remain CEO of Willis GP, a job he took over in January 2015 that includes Willis’s retail insurance business in Great Britain, facultative and London specialty businesses.

Before Willis, Aubert held various international executive roles at AIG.

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London-based specialist insurer Markel International appointed Steve Loader as senior underwriter, marine trades, in its marine and energy division.

Loader’s job will be to help launch Markel’s marine trades product, which will offer liability, property, equipment, business interruption, builder’s risk, vessel hull and employers liability cover on a global package basis. It will be offered for marine trades operations such as marinas, yacht clubs, boat dealers, vessel repairers/builders, fishing harbors and marine contractors.

Loader was most recently at RSA Plc, where he was a senior transportation underwriter going back to 2009 and also helped create and develop the marine trades account. He has nearly 30 years’ experience in the class.

Sources: Liberty Mutual, Validus Re, Willis, Markel International