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Claudio Mares

Claudio Mares, MBA, CPCU, ARe, ARM-E

Senior Underwriter

Claudio has 22 years of experience in the international insurance and reinsurance industry, providing complex insurance solutions for multi-national power generation clients. He is the lead underwriter for several of NRI’s nuclear liability and property risks and leads NRI’s underwriting team.

In addition to managing several key client and broker relationships, Claudio has a strategic insurance product line leadership role across various geographies and is responsible for the modernisation of the underwriting risk framework.

Before joining NRI in 2018, Claudio held a number of roles at AIG, including Regional Manager Energy & Engineered Risks, South Europe and Senior Underwriter Power & Utilities, Heavy Industries, Mining, London Market. He was also Senior Property Underwriter, Industrial Risks at Swiss Re Corporate Solutions.

He studied business at Kaderschule Zurich in Switzerland and was awarded the following designations by The Institutes in the USA: Chartered Property Casualty Underwriter, Associate in Reinsurance, Associate in Risk Management, Associate in Risk Management – Enterprise Risk Management.

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Dr. Tim Stone, CBE


Tim has been NRI’s Chairman since 2015 and is also the Chairman of the UK’s Nuclear Industry Association. Tim is a senior corporate advisor across energy and infrastructure sectors and was appointed to the European investment Bank by the British Government before stepping down in 2018. ds