Hubert Grignon Dumoulin

Matthew Dawson is Enterprise Acceleration, Ecosystem Development at the Ethereum Foundation, a position he has held since July 2025. He appeared as Enterprise Lead at the Ethereum Foundation at a May 2026 event in London hosted by The Big Whale, where he joined Franklin Templeton and 21x for a panel discussion on rebuilding the infrastructure of global finance using public blockchain rails. The conversation centred on replacing fragmented reconciliation-heavy ledgers with a single publicly verifiable ledger, and on the conditions under which institutional adoption of tokenised assets becomes viable.

Before joining the Ethereum Foundation, Dawson was an Associate at Outlier Ventures, a Web3 accelerator, from May 2024 to July 2025. Prior to that, he worked at Illumina Capital's blockchain accelerator in a research capacity from January 2022 to March 2023. His earlier career was in financial services consulting: he spent approximately a year and a half as a Consultant in Accenture's Financial Services Strategy and Consulting division, and before that worked as a Graduate Consultant at Atos in London focused on financial services technology, from October 2019 to December 2020. No educational background is included in the available source material.

Tomas Calatayud Guidi is Product Director, Executive Director – Kinexys at J.P. Morgan, a position he has held since February 2025. In this role he works on product development for Kinexys Digital Payments, with a focus on payments, blockchain, distributed ledger technology, and FX.

Calatayud Guidi has been part of J.P. Morgan's Kinexys unit since August 2022, when he joined as Product Manager Vice President, covering the same product areas before being promoted to his current title. Prior to that, from February 2021 to August 2022, he held a Vice President role in FX Product Management at J.P. Morgan in the United States, focused on FX payments new product development. He joined J.P. Morgan in October 2014 as an FX Operations Analyst in Argentina, progressing through senior analyst and operations manager roles before moving into product management as an Associate in New York in September 2018. Before J.P. Morgan, he worked as a Treasury Analyst at Noble Group in Argentina from May 2012 to September 2014, where his responsibilities included FX spot and futures operations, money market activity, financial planning, and foreign trade regulatory compliance. His total experience across these roles spans approximately thirteen years.

Pierre Castronovo is Fintech Lead - Netherlands at Visa, a position he has held since February 2024. His stated mandate is to foster partnership and collaboration with the Dutch fintech ecosystem. He also holds a concurrent role focused on Stablecoins GTM, as indicated by his profile headline. In his first year, he secured new business contributing to growth in average annual net revenue, established partnerships with three fintech scale-ups operating in issuance, open banking, and Tap-To-Pay, and organised a Visa fintech event with over 130 attendees. He has promoted Visa products including FlexCredentials and A2A at these engagements, and has mentored fintech founders through Startupbootcamp.

Prior to Visa, Castronovo spent six years at Accenture as Manager, Strategy & Consulting, based primarily in Dublin and Amsterdam. His project work there included defining digital retail banking and commercial strategy for a large Dutch retail bank, supporting the market entry of a Dutch digital insurer into Spain, and leading business development for the international expansion of a digital insurance platform from the Netherlands to Toronto. He is also co-founder of BuurBox, a peer-to-peer storage platform founded in 2025. His earlier career was in architecture, having worked as an architecture engineer at several Belgian practices between 2004 and 2009. He holds a Master's degree in Civil Engineering and Architecture from the University of Liège, where he studied from 1996 to 2004.