Our Team.
Dune Partners was established in April 2025 by Marieke Boudeling, Pieter van Dijke, and Sebastiaan Greeven, three former colleagues that have worked together in sustainability advisory for almost a decade.
Together, we’ve supported more than 60 investors and 250 companies in embedding sustainability into their strategies in a way that drives real results. We bring deep sustainability expertise, a strategic lens, and hands-on experience with how investors operate. What drives us is a genuine commitment to helping you realise the impact you aim for.
Below, you’ll find more about our backgrounds.
Partner
Pieter van Dijke
Pieter has a decade experience in strategy and sustainability. He started his career in 2015 at Royal Tropical Institute in Amsterdam as Chief of Staff. Subsequently, he moved to Australia, where he spent 3 years with Kearney working with a variety of teams across topics such as restructuring, digital transformation, finance & operations, predominantly in CMT.
After moving back to Amsterdam, and spending a half year sabbatical as a beer brewer, he joined the international sustainability consultant Holtara. Pieter played a crucial role in scaling the advisory arm of Holtara with a primary focus on helping companies and investors to develop and implement sustainability strategies.
He holds a MSc in Economics from Utrecht University and an MSc in International Relations from the University of Amsterdam.
Partner
Marieke Boudeling
Marieke has 9+ years of experience as a sustainability advisor. She started in 2017 with Spring Associates, where she specialised in developing and implementing sustainability strategies for private investors and their portfolio companies. Marieke has a proven track record in building sustainable businesses, including two years in New York, where she launched the advisory business for Holtara. She has successfully led advisory teams at Holtara and served as Deputy Head of Northern Europe.
Recognised as a leader in her field, she was named one of the Top 50 Women in Sustainable Finance in 2024.
She holds a Research Master’s in Multidisciplinary Economics from Utrecht University, specialising in game theory.
Partner
Sebastiaan Greeven
Sebastiaan has 10+ years of advisory experience in strategy and sustainability. He started his career in 2015 at IDEA Consult in Brussels, advising the European Commission on green economy, renewable energy, and technological innovation.
In 2017, he joined the strategy consulting boutique Spring Associates in Amsterdam, which later evolved into Holtara. At Holtara, Sebastiaan played a key role in scaling the company from 15 to 150 employees and co-founded the platform venture ESG Advantage.
He holds a BSc and MSc (both cum laude) in Complex Systems Engineering and Management from Delft University of Technology.
Manager
Gert-Jan van de Poll
Gert-Jan combines 7+ years of advisory experience with a focus on turning sustainability ambitions into measurable results. He started his career in 2018 as a financial consultant, supporting management teams on valuations, financing and growth strategies for impact-driven companies.
Before joining Dune Partners, he worked at Holtara from 2021, advising investors as well as private and listed companies. He supported clients on areas including sustainability strategy, carbon measurement and reduction, and CSRD reporting, while also developing practical solutions that enabled companies to measure, report and improve their sustainability performance.
He holds MSc degrees in Economics and Finance (cum laude) from the University of Groningen.
Manager
Kristo De Groodt
Kristo has 6 years of advisory experience in strategy and sustainability. He started in 2017 at EY in Toronto as management consultant focused on strategy, analytics and workshop facilitation.
In 2021, he moved to Amsterdam and built out expertise in sustainability advisory. At Holtara, he guided investors and entrepreneurs in their sustainability efforts, with a particular focus on impact investing; company-level strategic value creation; and carbon measurement & reduction. Alongside his hands-on experience, he is accredited by the CFA in Impact Investing.
He holds a Master’s in Business Economics from KU Leuven and a Bachelor of Commerce from the University of Toronto (both magna cum laude). He also holds CFA's Impact Investing Certification
Associate
Romée de Wilde
Romée has 4 years of consulting experience, including three years in sustainability advisory. At her previous employer, MJ Hudson / Holtara, she focused on supporting private market clients, particularly mid-market private equity firms, on developing and implementing portfolio decarbonisation strategies and creating additional value through introducing ESG-related initiatives.
Having grown up in Singapore and Malaysia, and with experience interning in Indonesia and studying in Hong Kong, Romée brings a strong international perspective to her work. Romée recently obtained the CFA Institute Certificate in Impact Investing and is actively involved in several female impact and sustainability communities.
She holds an MSc in Strategic Management (cum laude) from Erasmus University Rotterdam.
Associate
Joost Kist
Joost brings four years of professional experience in sustainable corporate finance and sustainability advisory. He began his career at Sustainable Capital Group, where he worked on financial advisory projects with a strong emphasis on sustainability-driven value creation.
Before joining Dune Partners, Joost worked at Holtara, supporting private market clients, particularly mid-market private equity firms, in developing sustainability strategies, driving company-level value creation, ensuring regulatory compliance, and streamlining ESG initiatives across diverse portfolio companies. In addition to his practical experience, he holds a CFA accreditation in Impact Investing.
Joost earned an MSc in International Financial Management and a BSc in International Business from the University of Groningen.
Consultant
Hugo Mohr
Hugo has over two years of experience in sustainability advisory, gaining expertise in sustainability strategy and private markets. At Holtara, he was part of the carbon & climate team and contributed to the development of the nature & biodiversity practice, an area he is particularly passionate about.
Before moving into advisory, Hugo gained experience through starting various sustainability-related businesses, ranging from a shared mobility concept to developing climate-adaptive pergolas for urban areas. He also worked in various nature conservation projects in Africa and Asia.
Hugo holds a Master's in Metropolitan Analysis, Design and Engineering from TU Delft and Wageningen University & Research (cum laude), and a Bachelor's in Economics & Business Economics from the University of Groningen.
Consultant
Lotte Langelaar
Lotte has a background in sustainable finance with a focus on ESG integration in private markets. She holds an MSc in Climate Change Finance and Investment from the University of Edinburgh (Distinction) and a BSc (cum laude) in Governance Economics and Development from Leiden University College.
During her studies she focused on international climate policy, ESG analyses, and impact investing. Additionally she spent time as a student consultant working on projects focused on ESG in private equity, and scaling transition finance in the UK.
Having spent the 3.5 years before joining Dune living in Australia and the UK, Lotte brings a strong global point of view to her work.
Consultant
Vera Looijschelder
Vera brings a background in sustainability consulting and the renewable energy sector. She holds an MSc in Sustainable Business and Innovation (cum laude) from Wageningen University and a BSc in Human Geography & Urban Planning from Utrecht University.
During her studies, she gained consulting experience at Sustainable Students Consultancy and interned at Copper8, a circular economy advisory firm. Alongside this, she deepened her knowledge of the financial sector through Dutchess Capital's immersive investment programme for female students.
After graduation, she began her career as an internal sustainability advisor at Generation Green in the renewable energy sector, where she focused on developing and implementing ESG policy.
Consultant
Skip Brinkhorst
Skip has a background in sustainability and economics. He holds an MSc in Global Business and Sustainability (cum laude) from Erasmus University Rotterdam and BSc in Politics, Psychology, Law & Economics, with a specialisation in Economics, from the University of Amsterdam.
During his studies, Skip was part of a student consultancy team providing strategic advice to (non-)profit organisations and spent multiple years working as a implementation specialist at an elderly care organisation, focusing on circularity and digital transformation.
Alongside his professional work, Skip is a board member of a charity, which focuses on supporting educational projects in the Western Sahel region.
Open application
At Dune Partners, we are always keen to connect with exceptional talent.
While we are not currently hiring for specific roles, we welcome expressions of interest from highly motivated individuals who aspire to perform at the highest level. We look for people with a strong academic track record, sharp analytical skills, and a genuine drive to create positive impact.
An affinity with sustainability, systems thinking, and long-term value creation is central to our work. If you are energised by tackling complex challenges and contributing to meaningful change, we would be pleased to hear from you.
Please send your application letter, CV, and academic transcripts (including high school, bachelor’s, and master’s grades) to info@dunepartners.nl.