Tom O’Sullivan

Tom O’Suillivan is one of the first originators of ISIC in 2017. As a long-time resident of Japan, he arranged some of the first meetings to explore the defense market.  Originally from Ireland, he is Managing Director of Mathyos Global Advisory, an independent energy and defense consultancy firm established in April 2012 in Tokyo.

Tom is a chartered accountant and a civil engineer, leveraging over 30 years of client-servicing experience within global financial institutions and infrastructure markets. He specializes in providing strategic and independent advice across Asia, with a core focus on energy markets and policy; advising clients on power generation technologies, nuclear energy, fuel usage, and distribution strategies; risk and financial management: infrastructure finance, asset management, and financial due diligence for investments in foreign markets.

For the defense sector, O’Sullivan analyses geopolitical intersections with energy security in east Asia. He built an extensive career in senior operational and management roles within leading global investment banks and asset management funds, primarily located in Japan, most recently as founder of Mathyos Global Advisory. Prior positions include COO of Gartmore Asset Management; COO of Deutsche Bank Japan; Chief Administration Officer of Merrill Lynch Japan; as Vice President of Citicorp Japan; and Associate of PricewaterhouseCoopers.

In addition to his consultancy work, Tomo frequently contributes expert analysis at the Foreign Correspondents’ Club of Japan (FCCJ), comments on regional energy dynamics for major publications like Reuters and has lectured in business at Saitama University.

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