Speaker details

Biography

John Siena, based in London, is Associate General Counsel, Co-Head Global Regulatory Strategy, for Brown Brothers Harriman (BBH). John chairs the Association of Global Custodian-European Focus Committee (AGC-EFC), chairs the Post-Trade Legal Committee for the Association of Financial Markets in Europe (AFME) and sits on the AFME Post-Trade Board. John sits on various European cross-sector steering and working groups focusing on post-trade matters as well as on the European Central Bank’s Advisory Group on Market Infrastructures (AMI-SeCo) and Corporate Events Group (CEG). John co-chairs the Legal/Regulatory Workstream of the Technical Group of the UK Accelerated Settlement Task Force (UK AST), is a member of the EU AST Industry Committee and is a member of the American Bar Association’s Business Law Section Task Force on Securities Holding Infrastructure, which is published its Report in the ABA’s The Business Lawyer in the summer of 2024. John co-wrote Financial Collateral, Oxford University Press (2020), contributed to The Alternative Investment Fund Managers Directive, Wolters Kluwer, 3rd Ed. (2020), which is planned to be updated in a fourth edition, and contributed to 40 ans de dématérialisation des titres en France (Forty years of dematerialisation of securities in France), Sorbonne/AEDBF (2024). John wrote Digital Ledger Technology: Cutting through the Paradox, published in the Journal of Securities Operations and Custody (vol. 15, Spring 2023) and in 2023 co-chaired the development of a Report on digital assets custody (DAC) sponsored jointly by the International Securities Services Association (ISSA) and Global Digital Finance (GDF), which may be found at: https://www.gdf.io/working-group/custody/ John for many years has lectured on financial services law at Leiden University, The Netherlands and King’s College, London, well as in Ireland’s Certified Investment Fund Director Institute. John formerly was Head of Asia Legal at BBH; Head of External and Regulatory Affairs, EMEA, at BNY Mellon; Assistant General Counsel, EMEA, at Brown Brothers Harriman; and Senior Legal Counsel at The Northern Trust Company. John is admitted to the Illinois Bar (1988).