Our Team | Dune Partners

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.

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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.

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Marieke Boudeling

Marieke has 8+ 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.

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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

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Gert-Jan van de Poll

Gert-Jan van de Poll 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.

Associate

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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 stakeholder engagement.

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.

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).

Consultant

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Romée de Wilde

Romée de Wilde 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.

Interested in joining?

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.