Meet Our Team

Our people are our business and it is on our people’s expertise, innovation, drive and relationships that we depend for the development of our business.

Erik Rietkerk

Chief Executive Officer

Erik Rietkerk is a chemical engineer, holding a business degree and boasting a long career in the oleochemical, mineral oil and agri business industry. His experience is in growing and integrating multi-asset operations and optimising process industry businesses in oils and fats, oleochemicals and biodiesel. This combined with operating multiple trading businesses gives Erik the skillset to grow Argent Energy into an industry leader in waste to energy.

Nicola Dean

Chief Financial Officer

Nicola Dean is a qualified finance professional with extensive experience in the energy sector. Having worked for many years in a multinational oil company, she established her expertise through a wide range of demanding finance roles. Other senior positions in the nuclear industry and the railway have enabled Nicola to demonstrate her transferable leadership skills, including ERP implementations and significant business transformation programmes. As a champion of diversity, Nicola has previously established a women’s network and enjoyed providing mentoring to others.

Lamberto Gaggiotti

Group Operations Director

Lamberto graduated in Chemical Engineering at the University of Genoa and holds a post-master’s degree in Engineering and Production of Building Materials from the Polytechnic of Milan. He has 20 years of international experience in the Oleochemical and Biofuels business, covering several managerial roles ranging from Quality Assurance to Plant Management and Technical Direction. Lamberto joined Argent in May 2022 as Group Operations Director, overseeing the operational, HSE, engineering and maintenance, QA/QC activities, and driving development plans of the sites in both UK and The Netherlands. Prior to Argent, Lamberto worked as Group Technical Head and Group Operations & Supply Chain Head Oleochemicals and Biofuels for Wilmar International Singapore, overseeing several manufacturing sites located in Indonesia, Malaysia, China, India, Africa and EU. His extensive technical, operational and leadership experience supports Argent’s long-term growth strategy to be at the forefront of the waste-based biofuel and waste to energy industry.

Victoria Oppenheim

Group Head of Supply Chain

Victoria is an experienced Supply Chain professional who joined Argent in 2020. She started her career at Tetra Pak in Sweden and Italy, ending up in the Netherlands where she worked for AkzoNobel and ADM. She has considerable experience in managing change projects, redesign of ERP and business processes and increased collaboration across teams. Victoria holds a business degree with a major in organisational development and change. Driven by creativity and motivational leadership she is a specialist in developing high performing teams and individuals. While Swedish is her native language, Victoria also speaks Polish, Dutch and English. In her free time she likes to explore the world with her husband and two children.

Jan Jaap Rodenburg

Group Head of Commercial

Jan Jaap holds a master’s degree in International Business and is a senior sales and trading executive with 15 years’ experience in commodities, spanning across Asia, Europe, and Africa. Prior to Argent he was General Manager Commercial with a large mining company. He intentionally switched to the renewables industry to contribute meaningfully to a more sustainable future. He joined Argent in 2020 heading up the trading desk and holding other various roles before his appointment as Group Head of Commercial in 2021. His in-depth knowledge of commodity markets and passion for developing commercial talents brings to Argent the commercial and leadership edge required for an ambitious and growing company.

dickon posnett professional portrait

Dickon Posnett

Corporate Affairs Director

Dickon works on market development for renewable fuels through regulatory and legislative incentives. In Europe, he is the President of the European Biodiesel Board (EBB), where he chaired the Advanced Biodiesel Committee for 10 years and has been a board member for eight years; and he represents Argent Energy in EWABA, the waste-based biodiesel association, as a board member. In The Netherlands, Dickon works with the biodiesel associations MVO and NVDB, and chairs the NBAA, an alliance of waste-based biodiesel companies. In the UK, he sits on the board of the RTFA, the association for renewable transport fuels. Dickon is responsible for trade defence matters, working directly with DIT in the UK and with the EU Commission through EBB. Dickon became a Chartered Marketer in 2004 and oversees the Marketing functions in Argent.

Mike Scott professional portrait

Mike Scott

Chief Technical Officer

Mike is one of Argent Energy’s founder members and is responsible for all technical and scientific aspects of the business. Mike oversees the development, implementation and management of Argent Energy’s innovation strategy. He also supports the CEO in the development of a medium, longer-term strategy through technology selection allowing the business to grow into other areas that involve the utilisation of waste-based raw materials.  Mike is a fellow of the Institute of Chemical Engineers and a Chartered Process Chemical Engineer, with over 20 years of experience covering process engineering and development, plant construction/optimisation and project management. 

Next up

Who We Are

Argent Energy Group produces second-generation biodiesel with the intention to decarbonise transport worldwide