Executive Committee

The Executive Committee is responsible for the day-to-day management of Marex Spectron Group.


Executive Committee

Ian Lowitt


Ian Lowitt joined Marex Spectron in July 2012 as CFO, becoming CEO in January 2016. He was previously 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.

Paolo Tonucci


Paolo Tonucci joined Marex Spectron in March 2018 as Chief Operating Officer. He was previously at Commonwealth Bank of Australia (Commbank) based in Sydney, where he was Group Treasurer, with responsibility for funding, capital and balance sheet management. Before Commbank, he was Head of Funding and Liquidity at Barclays Bank in London. Prior to Barclays, Paolo spent 12 years at Lehman Brothers in London and New York, latterly as Global Treasurer where he managed a team of 220. Paolo is a Chartered Accountant and has an MA in Economics from the University of Cambridge.

Simon van den Born


Simon van den Born was appointed President in 2019, having previously been Head of Metals. He joined Marex Spectron in 2010 and was appointed to the Board of Marex Spectron Group in January 2016. He previously spent ten years at Goldman Sachs in the Commodity Index and Metals teams before moving to become a Portfolio Manager at Valhalla Capital Management in 2004.

Nick Jones

Head of Legal

Nick Jones was appointed Head of Legal in September 2019. He joined Marex Spectron in June 2013 as Legal Manager, before becoming Deputy Head of Legal and Compliance in December 2018. Nick was previously at Simmons & Simmons LLP where he trained and qualified as a solicitor in 2008. Nick has an LLB in European Legal Studies from the University of Bristol.

Nigel Grace

Chief Financial Officer

Nigel Grace joined Marex Spectron in April 2019 as Chief Financial Officer. He was previously at Castleton Commodities International in London, where he was Head of Metals Operations. Prior to that, he held a number of other senior positions, including Head of Finance at Armajaro Trading Ltd, Head of Metals Product Control at JP Morgan and had various roles at Sempra Metals Group Ltd, including Financial Controller, Treasurer and Head of Credit. Nigel is a Chartered Accountant and has a degree in Economics and Accounting from Bristol University.

Jeremy Elliott

Group Head of Energy

Jeremy Elliott joined Marex Spectron in September 2013 from ICAP as COO of the Energy division before becoming MD and co-head in August 2014. Jeremy held a number of roles at ICAP latterly as business manager of the Energy unit with primary responsibility for new business initiatives and electronic broking. He has more than 15 years' experience in the financial and energy markets.

Nilesh Jethwa

CEO, Marex Solutions

Nilesh Jethwa is the CEO of Marex Solutions, which he set up in 2017. He was previously at Leonteq, a Swiss-based FinTech company, which he helped launch and was ultimately IPO'd, running their Markets Division, managing Trading, Sales Structuring, Quantitative Analytics and Treasury. Prior to Leonteq, he spent eight years at Lehman Brothers, latterly as Head of Stock Exotics trading for Europe and Middle East. He is a Non-Executive Director of Ardent Media and Trustee of Noah's Ark Children's Hospice. Nilesh has an MA (hons) in Mathematics from the University of Cambridge.

Bastien Declercq


Bastien Declercq is the CEO of CSC Commodities, which he co-founded in 2013. He started his career as a trader at Morgan Stanley Commodities and then UBS, where he headed the oil flow trading business. Bastien has a Master in Mechanical Engineering from Ecole des Ponts Paritech and a Master in Physics from University Paris 7.

Jason Manumaleuna

CEO, Rosenthal Collins Group

Jason Manumaleuna is the CEO of Marex Spectron's Rosenthal Collins Group (RCG) division, having previously been RCG's President and Chief Financial Officer. Before RCG, Jason was Chief Financial Officer at R.J. O'Brien, where he saw the two-fold growth of the customer segregated funds and helped navigate the firm through the new enhanced customer protection rules. He has also worked at Calyon Financial, LFG and the Chicago Mercantile Exchange. Jason has a Bachelor of Arts in Accounting from the University of Illinois at Chicago.

Susana Paz Mármol

Head of Compliance

Susana Paz Mármol joined Marex Spectron in June 2019 as Head of Compliance. Prior to joining Susana worked in New York as Head of Americas Commodities Compliance at Société Générale from 2012 through 2018. She has also held roles in Compliance with HSBC Bank Plc, Jefferies Bache LLC, Barclays Capital, RBS Greenwich Capital and Credit Suisse. Susana has spent the majority of her career in New York working in compliance functions advising on physical, financial and structured commodities solutions with a specific focus around energy products and Canadian and US regulations.

Richard Reid

Chief Risk Officer

Richard Reid became Chief Risk Officer in August 2015, having joined Marex Spectron in February 2014 as Head of Market, Credit & Operational Risk. He started his career at Credit Suisse First Boston in several control function roles, before moving into a proprietary trading position. He moved to BHP Billiton, serving as a Market Risk Manager, before returning to Credit Suisse to start up the market risk function in the bank's commodities business. At Credit Suisse he also served as Head of Commodities Market Risk, EMEA & Asia and Senior Director and Secretary to the Credit Suisse Capital Allocation & Risk Management Committee (CARMC) as well the Investment Bank Risk Management Committee (IB RMC).

Alison Forward

Group HR Director

Alison Forward is Head of Group Human Resources. She joined in 2018 from British Business Bank where she was Managing Director HR. Previously, Alison was at HSBC where she performed various roles including the Global Head of HR for the Retail Business. Alison has also held senior HR roles at Prudential PLC and AXA Insurance. She is a Fellow of the Chartered Institute of Personnel & Development and has an MSc in Occupational Psychology and a BSc in Psychology.

Michael Dugan

Chief Technology Officer

Michael Dugan was appointed Chief Technology Officer at Marex Spectron in 2019, having previously headed-up the group's technology department. Beforehand he was at Schneider Trading and has worked as a Software Engineer/Architect in the Automotive, Defense and Multimedia industries. Michael has a BEng (hons) from Curtin University.

Ben Bennett

Global Head of Operations

Ben Bennett joined in 2010 as Global Head of Operations. He was previously at Man Group, where he spent 14 years, latterly as the head of global middle office for financial futures. He has more than 20 years' experience in financial services.


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