Meet Our Leadership Team

Grey 7248
Greg Newman Chief Executive Officer

Greg operates as the Group Chief Executive and an Executive Director on the Company’s Board. Greg pulled back from trading as Head of Crude at Onyx in early 2019 to focus on driving the company’s growth and strategic vision full-time. Greg holds a BEng in Biochemical Engineering from University College London.

Grey 6799
Omar Kayaam Chief Investment Officer

Omar pulled out of full-time trading in 2022 to oversee operations and expansion in our world-leading market-making operation. Omar also operates as Executive Director on the Company's Board. He holds an M.Sc. and a B.A. Hons. in Chemical Engineering from the University of Cambridge.

Jonathan Pegler (1)
Jonathan Pegler Non-Executive Chairman

Jonathan has over 30 years of experience in the oil industry, operating in senior roles at BP, Hetco, Trafigura and Puma Energy. Jonathan was a founding investor in Onyx at its inception and has operated as Non-Executive Chairman since 2019.

Grey 7259
Miles Hempsall Chief Revenue Officer

Miles has over 30 years of experience in the oil & gas industry ranging from trading and business development in the Former Soviet Union to building research analysis and data businesses at PIRA Energy Group and Energy Aspects Ltd. Miles is responsible for revenue growth in our non-trading arms from research and data to technology and brokerage.

Henry Monahan Director of Risk & Equity Partner

Henry has over a decade of experience in finance, working in senior operations roles within commodity trading firms. These include Man Group and Mandara Capital where he first met Greg and Omar.

Grey 6913
Andrew Pratt Senior Financial Controller

Andrew is a fully ACCA qualified accountant and has worked in various financial roles for the last 30 years. Andrew has extensive experience within the Financial Services industry including Investment and Asset Management, Institutional sales, research, trading and corporate finance. Andrew oversees all finance operations across the Group.