David Barrett

Chairman

Committee Roles: Nominations Committee, ESG Committee (Chair)

Co-founded London Concrete in 1997, subsequently building the business from one concrete plant in London to over a dozen plants around the capital. London Concrete was sold to Aggregate Industries and is currently the number one concrete supplier in London, with flagship projects such as the London Olympics, the Shard, the US embassy and the new Bloomberg building. Having previously worked with Pioneer, David retired from London Concrete in 2015 and is widely considered an expert in the industry.

Max Vermorken

CEO

Committee Roles: Safety Committee

Prior to SigmaRoc, Max was strategic advisor to the CEO of LafargeHolcim Ltd (LafargeHolcim) Northern Europe, the world’s largest construction materials group. His role included responsibility for the merger of Lafarge SA and Holcim Ltd in the region involving the only Day 1 integration of the two businesses following the hive-down and integration of two large asset portfolios – a mix which included two cement plants and a multitude of down-stream aggregates and construction materials assets. Prior to working for LafargeHolcim, Max worked in private equity at Luxembourg-headquartered The Genii Group, where he reported directly to its founding principals. Max holds a PhD in Financial Economics from University College London and Bachelor and Master degrees in both Civil Engineering and Financial Economics from University College London and the University of Brussels respectively.

Jan Van Beek

CFO

Jan qualified as an accountant with Deloitte and led their international practice in the Netherlands. He subsequently built a distinguished career in senior finance roles within the minerals and chemicals industry based in Europe and the USA. During his time at Shell plc spin-out Hexion Jan was Global Finance Director and subsequently CFO of several divisions, comprising turnover of over USD 4bn and sales in 4 continents. At Hexion Jan was jointly responsible for investor relations work in relation to USD 3bn NYSE listed bonds, their financing of multi-layered debt facilities as well as reporting work up to ultimate owner Apollo Global Management. At the end of his tenure with Hexion, Jan became CFO designate of a USD 2bn spin-out. Most recently Jan was Head of Finance at ASML, the world leading producer of machines for the semiconductor industry with a market capitalisation of EUR 250bn.

Simon Chisholm

Senior Independent Non-Executive Director

Committee Roles: Audit (Chair), Remuneration (Chair), AIM & UK MAR Compliance (Chair) & Nominations

Simon is the founder and managing director of Feros Advisers, having previously been Head of Equity Capital markets at Redburn (Europe), a subsidiary of Rothschild & Co. Simon joined Berenberg in 2003 and established an office for them in London. Over the next 10 years Simon was one of the principal architects in building the business from 3 people in London to around 140 and establishing the bank as a recognised brand name in the global investment community. Before joining the sell-side, Simon was a fund manager investing in European equities first at Singer & Friedlander and then at Henderson Global Investors and ran European Smaller Companies investment products. After University Simon joined Coopers and Lybrand and qualified as a Chartered Accountant.

Jacques Emsens

Independent Non-Executive Director

Committee Roles: Audit Committee, AIM & UK MAR Compliance

Jacques was a Board member and Assistant to the Chairman of SCR-Sibelco N.V; a world leading materials solutions company specialising in sands and industrial minerals. He is a founding member of JPSeven and is a member of the Board of Sofina, and numerous other companies. Jacques has a long history in defining and implementing strategies of industrial businesses. Jacques holds a degree in Business Administration from the European University of Antwerp, from the Université Libre de Bruxelles and from the London Chamber of Commerce and Industry and speaks French, Dutch and English.

Axelle Henry

Independent Non-Executive Director

Committee Roles: AIM & UK MAR Compliance Committee

Axelle has served as Chief Financial Officer for Verlinvest Group, a Brussels-based international investment business, since April 2014 and also serves on the board of directors for a number of their private companies, as well as Nasdaq quoted Vita Coco. She has held a variety of senior executive positions, including as Deputy Chief Financial Officer of Groupe Bruxelles Lambert. Ms Henry has over 20 years’ experience in the Private Equity and Investment Sector, starting her career with KPMG as senior auditor. She holds degrees in commercial engineering from the Solvay Business School.

Tim Hall

Non-Executive Director

Committee Roles: Safety Committee, Remuneration Committee, ESG Committee

Tim has spent his entire career in the aggregates industry, most recently as CEO of Breedon South, a business he helped build from inception and from which he retired in August 2017. Prior to this he was director of Tarmac Limited’s Western Area; managing director of Tarmac Western Limited, the company formed by Anglo American from the former assets of Nash Rocks, Tilcon and Tarmac. He spent the previous 27 years with Nash Rocks, latterly as managing director. Tim brings a wealth of experience and knowledge of the industry to the Board. Tim’s knowledge and network within the industry supports SigmaRoc’s growth in the aggregates and construction materials market in the UK.

Peter Johnson

Independent Non-Executive Director

Committee Roles: Nominations Committee (Chair), Remuneration Committee

Peter was previously chief executive of George Wimpey plc and prior to that chief executive of The Rugby Group plc up to its acquisition by RMC Group. Most recently he has been Chairman at Electrocomponents plc and Wienerberger AG and was previously Chairman of DS Smith plc.

Francesca Medda

Independent Non-Executive Director

Committee Roles: Audit Committee, ESG Committee

Francesca Medda is a Professor of Applied Economics and Finance at UCL. Francesca coordinated the digital strategy and plan of the Italian Financial Conduct and Supervisory Authority, CONSOB. She has also served as an adviser to the Defra and HM Treasury and is a vice president of the Parliamentary and Scientific Committee. Francesca has worked with both the private and public sectors, including The European Investment Bank, The World Bank, UNESCO, UN Habitat, Willis Re, Halcrow group, and International Association of Public Transport (UITP).