Group Board

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Carla Stent

Chair of the Group Board

Carla Stent was appointed Non-Executive Chair of the Marex Board in January 2019, having previously been a Non-Executive Board Member since 2014. Carla has extensive executive and non-executive international experience across financial services, principally banking and private equity, as well as retail and travel.

Her current Board roles Telecom Plus plc, and the Evelyn Partners Group. She has also served on the boards of Power to Change, Savernake Group, Change Alliance (India) Private Limited, Christian Aid, The Young Women’s Trust, JP Morgan Elect plc, Post Office Limited and various Virgin Group entity boards, amongst others. From 2010 to 2013, Carla was Chief Operating Officer and Partner at Virgin Group. She was previously Deputy Chief Financial Officer and Chief Administrative Officer of the Global Retail and Commercial Bank arm of Barclays Bank.  From 2000 to 2004, at Thomas Cook AG Group, she held a variety of roles, including Operations Director, as well as Director of Group Strategy & Corporate Finance.

Carla is a qualified Chartered Accountant and has a Masters in Advanced Accounting, Taxation, Business Administration and Auditing from the University of South Africa, Cape Town.

Group Board

Ian Lowitt

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Ian Lowitt joined Marex in 2012 as CFO, becoming CEO in 2016. He has previously held senior roles at Barclays Wealth America where he served as Chief Operating Officer. Prior to Barclays, Ian spent 14 years at Lehman Brothers, latterly as CFO and prior to that, as Co-Chief Administrative Officer.

Ian’s background includes expertise in electronics and information technology. He holds degrees in Electrical Engineering and Digital Electronics from the University of the Witwatersrand, South Africa, a BA in Philosophy, Politics & Economics and an MSc in Economics from the University of Oxford, where he was a Rhodes Scholar.

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.

Lord Stanley Fink


Lord Stanley Fink is a well-known financial services professional, with a long and diverse track record in the industry. He holds a degree in Law from Trinity Hall, University of Cambridge and is a Chartered Accountant. He has worked at Mars and Citibank NA before joining Man Group plc in 1987, stepping down as Deputy Chairman of the Group in 2008 after a career spanning 21 years including as Group CEO. He was formerly the Chairman of ISAM Europe LLP and Zenith Hygiene Group plc and is now currently Chairman for Bud Financial Limited and a non-executive director of Marex and British Pearl.

Lord Fink is a committed philanthropist, whose focus is health, education and the environment. His roles include being a Trustee of ARK (Absolute Return for Kids), a Trustee of the Mayor’s Fund for London and Co-Chairman of the Board of Governors of the Oxford Centre for Hebrew and Jewish Studies. He was Chairman of the highly successful campaign by the Evelina London Hospital’s Appeal to raise £10 million to assist in equipping the new hospital in 2005. He is also Chair Emeritus of the Board of Governors of Burlington Danes Academy, which he sponsored through ARK. Lord Fink was raised to the Peerage in 2011.

Jeremy Isaacs CBE

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Jeremy Isaacs is a Founding Partner of JRJ Group, with 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, Middle East, and Asia. Before joining Lehman Brothers, he led the European equity derivatives trading business of Goldman Sachs.

Jeremy serves as a non-executive director of Marex and Go Acquisitions Corp. He participates in numerous philanthropic activities, holding a range of positions, including Trustee of The J Isaacs Charitable Trust and Chair of Trustees for the Noah’s Ark Children’s Hospice. He has previously served as non-executive director of Imperial College Healthcare NHS Trust 2003-16; Member of British Olympic Advisory Board 2007-12, and member of the Bridges Development Fund Advisory Board 2008-18. 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

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Joseph Cohen is one of the three Founding Partners of Trilantic Europe. Prior to Trilantic Europe, Joe spent 20 years at Lehman Brothers, of which 13 years at Lehman Brothers Merchant Banking where he was the European Co-Head. He was also a member of the Lehman Brothers’ Investment Management Division’s European Operating Committee. Prior to that, he was a member of Lehman Brothers Corporate Finance team based in Paris, New York, and London. Joe is currently a director of Marex and YM&U. Joe holds a BSc in Economics from London School of Economics.

Roger Nagioff

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Roger Nagioff is a founding partner of JRJ Group and has 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.

Mr Nagioff 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.

Mr Nagioff holds a BA in Law.

Konstantin Graf von Schweinitz

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Konstantin Graf von Schweinitz was appointed as an Independent Non-Executive Director in September 2021.  Konstantin is an experienced banker, non-executive board director, chairman, and advisor, with over 35 years’ experience in capital markets, investment banking, commercial and private banking, and asset management. His current roles include acting as an Independent Non-Executive Director and Chair of the Risk Committee at SG Kleinwort Hambros Bank Limited and a Non-Executive role at Egerton Capital Funds.

Konstantin previously held a variety of executive roles at Dresdner Group, including Head of Risk Management for investment banking.

He has a BA and MA in History and Economics from Oxford University.

Sarah Ing

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Sarah Ing joined the Group as an independent non-executive director in July 2021. 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, XPS Pensions Group plc and Gresham House plc.

Sarah is a Chartered Accountant, and has a BSc Hons in Botany from Durham University.


Robert Pickering

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Robert Pickering is an experienced non-executive director in financial services, joining the Group in September 2021. Previously he served at Itau BBA, the investment banking arm of Itau Unibanco, for 9 years. He began his long career in the City at Cazenove, where he spent 23 years building their financial advisory practice and growing their wealth management division, becoming their 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 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 a MA in Law from the University of Oxford

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.