Leadership team

Bas Verkooijen

Chief Executive Officer

With 25 years of experience in the energy industry, Bas has led businesses in over 25 countries. As the CEO of Advario, Bas is passionate about building a new, world-class organisation that develops better business through successful partnerships and acts as a frontrunner in the energy transition.

Prior to joining Advario, Bas worked at OMV. In his role as the Senior Vice President Product Supply & Sales and member of the OMV Downstream leadership team, he was responsible for the group’s supply, logistics and commercial sales of refined products as well as petrochemicals. Bas started his career at Shell where he led various downstream businesses in Europe, Russia, Middle East, Asia and Oceania.

Bas holds a master’s degree in Business Administration from the University of Groningen in the Netherlands.

Douglas van der Wiel

Chief Growth Officer

As Chief Growth Officer, Douglas van der Wiel focuses on keeping Advario’s customer-centric strategy and vision front and centre, while improving the company’s competitiveness. Douglas started his career at Oiltanking as Business Development Manager in Singapore in 2001. After more than five years in the region, he was transferred to Oman as Commercial Manager for Oiltanking Odfjell Terminals & Co.

In August 2009, Douglas took on the challenge as Chief Executive Officer of the joint venture between Star Energy and Oiltanking in Dubai. In August 2013, he transferred back to Singapore to take up the position of Vice President Commercial, Oiltanking Asia Pacific for a year, after which he was appointed President, Oiltanking Asia Pacific. In 2020, he transferred to the Netherlands as regional Senior Vice President at Oiltanking, responsible for the EMEA region.

Douglas holds a master’s degree in Business Administration from the Erasmus University in Rotterdam in the Netherlands.

Liz Mayhew

Senior Vice President, People

Building on a successful career in retail management before moving into Human Resources, Liz Mayhew has a wealth of experience in HR practices across a variety of international businesses. Between 2005-2011, as VP Human Resources Europe at Tommy Hilfiger, Liz built HR function for the European headquarters through a period of rapid growth, including privatisation, M&As, and acquisition by PVH as a US listed company. She was also VP Human Resources Europe & Franchise business at Gap Inc., where she built HR function for European and global franchise business at a point in time where Gap underwent global reorganisation. Furthermore, as Director Business Partnering (Middle East) at M.H Alshaya, she led HR teams across the Middle East, delivering HR agenda and supporting nationalisation and feminisation agendas.

Liz has also been Senior Vice President People & Communications at Oiltanking, between 2019-2022, driving global talent acquisition, organisational development, strategic planning, employee engagement, and external communications.

Liz holds a postgraduate diploma in Human Resources from Middlesex University in the UK, and a diploma in business studies and languages from North East Scotland College.


Yvan Tavernier

Chief Operational Officer

With 25 years’ experience in leadership in business unit and corporate executive , Yvan is an international senior executive who is passionate about leading and transforming organizations towards excellence.

Prior to being appointed Chief Operational Officer at Advario, Yvan has been responsible for Oiltanking’s global assets, operations and health and safety strategy, leading to increased profitability, productivity, and safety performance. Yvan joined Oiltanking in 2013 as Managing Director of Oiltanking Stolthaven Antwerp NV.

Yvan started his career at Solvay where he led various petrochemical manufacturing sites in Belgium and France. Prior to joining Oiltanking, Yvan was leading the moulded glass business in the US for Gerresheimer GmbH.

Yvan holds a master’s degree in Chemical Engineering from Vrije Universiteit Brussel, Belgium.

Claas Pinkenburg

Senior Vice President, Strategy, Portfolio & Sustainability

As an expert in strategy and transformation, Claas Pinkenburg drives Advario’s strategy definition and implementation including the implementation of Advario’s sustainability strategy. In addition, he is leading Advario’s M&A activities.

Prior to his executive role at Advario, Claas was Senior Vice President Portfolio and Strategy at Oiltanking, responsible for Oiltanking’s Program Accelerate, which led to a major portfolio shift towards chemicals and new energy. Claas has also been the Head of Corporate Development of Advario’s mother company, Marquard & Bahls AG, where he was responsible for defining the M&B group strategy and the group-wide strategy processes.

Between 2010-2018, Claas worked as a strategic management consultant at Boston Consulting Group, leading as a Principal growth strategy , organizational development and transformation projects in energy and industrial goods sectors.

Claas holds a diploma in Industrial Engineering from Karlsruhe Institute of Technology (KIT), Germany, in addition to a Master of Science degree in Industrial Engineering from Georgia Institute of Technology, Atlanta/US.



Sophie Challet

Chief Financial Officer

With 27 years of experience in multinational companies in the Oil & Gas, Water, Waste, Electricity & Transport industries, Sophie Challet is a highly experienced finance executive, who oversees Advario’s global finances.

Sophie has lived and worked in many countries, including Monaco, China, Hong Kong, UK, USA, Equatorial Guinea, Qatar, and the UAE. Prior to joining Advario, Sophie was CFO Middle East for Egis, a French engineering and project management organisation. She has also held various senior finance and audit positions in companies such as SBM Offshore, Alstom Grid, Suez Group, Europcar & Deloitte..

Sophie holds a master in Economics and Business administration from Audencia Business School in France.