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Tom has represented clients in a broad range of disputes both in arbitrations proceedings (including ICC, UNCITRAL, SIAC and NAI) and in proceedings before Dutch state courts (courts of first instance and courts of appeal) as well as the courts of the Netherlands Antilles.

Sectors & Markets
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Memberships

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The Advisory Board of the Netherlands Arbitration Institute (NAI)
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The Executive Board of the Dutch Arbitration Association (DAA)
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Qualifications

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Dutch Law, University of Leiden, 1991 (with honors)
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Southern Methodist University Summer Program (Dallas, Texas) 1998

What others say

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"Leading partner Tom Claassens is very smart and likeable. His team of associates work hard and are committed. The quality of the output is high. Tom Claassens is a great lawyer – smart, results-oriented, creative. He is the lead arbitration partner: experienced, smooth and well versed in the international arbitration practice. Being a very nice guy helps."
Legal 500 (2021)
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Tom Claassens acts for a clientele of national states and domestic companies on arbitral matters covering commercial disputes, arbitral awards and bilateral investment treaties. Market commentators highlight his work in arbitration proceedings of an international scope.
Chambers Global (2021)
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''According to sources, Tom Claassens is "first rate, intelligent and diligent." He acts for clients on arbitration proceedings following corporate transactions, joint ventures and arbitral award annulment procedures. His clients include multinational corporations and state governments.''
Chambers Global (2020)
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"Tom Claassens has experience in commercial litigation and is increasingly focused on international arbitration. He is described as 'incredibly client-focused and smart' as well as a 'strategic thinker who comes up with creative arguments'."
Chambers Europe (2019)
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"Sources say: 'He is a fantastic lawyer: smart, effective, advises clients well, writes well and also speaks well in court'."
Chambers Global (2018)
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"According to clients, Loyens & Loeff’s team is ‘responsive, thorough, hardworking and a pleasure to work with’, and has significant experience representing international clients in International Chamber of Commerce proceedings. It is led by the ‘very detailed, thorough’ Tom Claassens, who is ‘an authority on Dutch civil procedure’ and 'a name to note'." Mr Claassens is also listed in Who's Who Legal: Litigation 2018 among only 16 Dutch litigation peers.
Legal 500 (2018)
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"Tom Claassens is an excellent practitioner."
Legal 500 (2022)
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"Tom Claassens is very likeable, professional and with a good eye for what will be appreciated by the courts."
Legal 500 (2022)
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"Tom Claasens is experienced; and although originally and for a long time in his career a litigation lawyer, he has made a name for himself in arbitration in recent years."
Legal 500 (2022)
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"Tom Claassens particularly assists clients with the enforcement or annulment of arbitral awards. He also represents clients in shareholder disputes and damages claims under a variety of arbitral rules, including NAI and SIAC rules. A client appreciates that Tom Claassens has the "ability to really connect and get the best out of people," adding that "his approach to the people he works with is such that they feel really comfortable sharing everything, which strengthens the case."
Chambers & Partners Global (2022)
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"Tom Claassens has the ability to really connect and get the best out of people."
Chambers & Partners Europe (2022)
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