Group Board

Robert Pickering cropped IMG_0677 copy

Robert Pickering

Chair of the Group Board

Robert Pickering is an experienced Non-Executive Director in financial services. He joined the Group in September 2021, becoming Senior Independent Director in March 2022, and was appointed Chair of the Board in October 2023. Previously he served on the Board at Itau BBA, the investment banking arm of Itau Unibanco, the largest private sector bank in Brazil. He began his long career in the City at Cazenove, where he spent 23 years building its financial advisory practice and growing its wealth management division, becoming its first Chief Executive at the age of 41. Robert negotiated and led Cazenove’s highly successful joint venture with JPMorgan in 2004. Since leaving Cazenove in 2008, he has focused on a portfolio career, acting as an advisor to private individuals and boards, mainly in financial services. Robert’s extensive experience on various boards has included a myriad of corporate transactions including IPOs, mergers, fund raisings and private equity. Robert holds an MA in Law from the University of Oxford.

Group Board

Ian Lowitt


Ian Lowitt was appointed as a Director in November 2012 and became Chief Executive Officer in January 2016. He was previously at Barclays Bank where, after the acquisition of Lehman Brothers, he managed integration of the businesses and support functions, and served as the COO of Barclays Wealth America. Prior to Barclays, Ian spent 14 years at Lehman Brothers, latterly as Chief Financial Officer, and before that was Co-Chief Administrative Officer for the firm, responsible for Systems, Operations, Finance Risk and Expense Management. Prior to this role, he was the Head of Strategy, Global Treasurer and Head of Tax; and European Chief Administrative Officer. Ian has an MSc in Economics, and an MA in Economics, Philosophy and Politics from the University of Oxford, which he attended as a Rhodes Scholar, and a BSc and an MSc in Electrical Engineering from the University of Witwatersrand in Johannesburg.

Rob Irvin


Rob Irvin became Chief Financial Officer at Marex in April 2023. Rob was previously at HSBC for over ten years where he undertook various senior finance leadership roles. He was latterly the CFO of their Global Private Bank & Wealth business, focusing on implementation of structural change and execution of strategy, and prior to that as CFO of Global Banking, driving business change to raise capital efficiency and improve shareholder returns. Before HSBC, he was an assistant director in transaction services at Deloitte LLP, focusing on both financial and operational due diligence on major capital markets transactions. Rob is a chartered accountant, and has a BA (Hons) in Economics and Social History from University of York.

Sarah Ing


Sarah Ing joined the Group as an Independent Non-Executive Director in July 2021, becoming Chair of the Audit and Compliance Committee in March 2022 and the Senior Independent Non-Executive Director in October 2023. She is an experienced non-executive director in the financial services sector and has over 30 years’ experience in accountancy, investment banking and fund management. Previously, Sarah founded and ran a hedge fund investment management business and was also a top-rated equity research analyst covering the general financials sector. Sarah is also an independent non-executive director and committee chair at CMC Markets plc and XPS Pensions Group plc. She is a chartered accountant and has a BSc Hons in Botany from Durham University.

Konstantin Graf von Schweinitz


Konstantin Graf von Schweinitz joined the Group as an Independent Non-Executive Director in September 2021 and was appointed Chair of the Risk Committee in August 2022. Konstantin is an experienced banker, non-executive board director and advisor, with over 35 years’ experience in capital markets, investment banking, private banking and asset management. His current roles include acting as Independent Chair of SG Kleinwort Hambros Bank and as a Non-Executive Director at Egerton Capital. Konstantin previously held a variety of executive roles at Dresdner Group, including Head of Risk Management for investment banking. He has a BA and an MA in History and Economics from Oxford University.

Linda Myers


Linda Myers joined the Group as an Independent Non-Executive Director and Chair of the Remuneration Committee (subject to regulatory approval) in January 2024. Linda has had an extensive career practicing corporate law, having been a senior partner at international law firm Kirkland & Ellis LLP until 2022. At Kirkland & Ellis, Linda served on its global management committee from 2010 to 2020 and focused her practice on debt financing transactions for a range of public and private companies. As well as chairing the committee responsible for all the firm’s policies, she was a member of two committees that were responsible for compensation. Linda has a strong track record of supporting diversity goals, having established a number of diversity-focused task forces and initiatives at Kirkland & Ellis. Linda also sits on the boards of the National Philanthropic Trust, Gibraltar Industries and LCI Industries.

Madelyn Antoncic

Madelyn Antoncic

Madelyn Antoncic joined the Group as an Independent Non-Executive Director in January 2024. Madelyn, a Ph.D. Economist and former World Bank Vice-President and Treasurer, is currently Senior Fellow at New York University, Development Research Institute. At the World Bank, from 2011 to 2015, Madelyn was responsible for overseeing every aspect of managing the bank’s and other official-sector institutions’ assets, as well as the bank’s capital, annual funding program, collateral and cash management, and daily cash payments and disbursements. She is a former Economist at the Federal Reserve Bank of New York; was Senior Advisor to the United Nations Conference on Trade and Development (UNCTAD) on Sustainable Development Goal (SDG) Reporting; and has held senior positions at Goldman Sachs, Barclays, Lehman Brothers, and Principal Global Investors. Her experience spans global markets across numerous asset classes in senior market and risk roles, and she is renowned for her leadership in financial innovation and risk management. Madelyn also sits on the board of ACWA Power; Weill Cornell Medicine; and is a Member of the UK’s Foreign, Commonwealth and Development Office Research Advisory Panel.

Jeremy Isaacs CBE


Jeremy Isaacs represents the investor, JRJ Group, on the Marex Board. Jeremy is a Founding Partner of JRJ Group and has four decades of financial services industry and investment experience. At JRJ Group, Jeremy is closely involved with the implementation and guidance of fund strategy, as well as the development and execution of portfolio company strategy. He is also central to the development and maintenance of JRJ Group’s extensive financial industry relationships with senior personnel across the institutional landscape, as well as with regulators and governments. Prior to establishing JRJ Group in late 2008, Jeremy was the Chief Executive Officer of Lehman Brothers in Europe, the Middle East, and Asia. Before joining Lehman Brothers, he led the European equity derivatives trading business of Goldman Sachs. He participates in numerous philanthropic activities, holding a range of positions, including Trustee of The J Isaacs Charitable Trust and Honorary Chair of the Noah’s Ark Children’s Hospice. He has previously served as non-executive director of Imperial College Healthcare NHS Trust, as a member of the British Olympic Advisory Board and as a member of the Bridges Development Fund Advisory Board. Jeremy was appointed Commander of the Order of the British Empire (CBE) in the 2015 Queen’s Birthday Honours for his services to the NHS. He is an Honorary Fellow of the London Business School and a Doctor of Philosophy, Honoris Causa, Haifa University, Israel.

Joe Cohen


Joe Cohen represents the investor, Trilantic Europe, on the Marex Board. Joe is one of the three Founding Partners of Trilantic Europe, and prior to that he spent 21 years at Lehman Brothers, 13 of which were at Lehman Brothers Merchant Banking, where he was European Co-Head. He was also a member of the Lehman Brothers Investment Management Division’s European Operating Committee. Prior to that, Joe was a member of Lehman Brothers’ Corporate Finance team based in Paris, New York and London. He is also currently a non-executive director of Verian (formerly Kantar Public). Joe holds a BSc in Economics from the London School of Economics.

Roger Nagioff


Roger Nagioff represents the investor, JRJ Group, on the Marex Board. Roger is a Founding Partner of JRJ Group and has over 35 years of operating and investing experience in the financial services and real estate industries. Prior to co-founding JRJ Group, he served in various senior executive positions within Lehman Brothers, holding leadership roles in a number of business lines in Europe and the United States. Roger was Global Head of Fixed Income at Lehman Brothers, succeeding to the role from his previous position as Chief Operating Officer for Europe, and before that, as Co-Head of Global Equities. Roger holds a BA in law.

The Team

The Marex senior management team and the Board that oversees them is made up of individuals with incomparable experience in commodities and financial services.