Our Team
TheRockGroup team integrates experience and knowledge from people with very different professional and personal backgrounds to aid in the transition to a sustainable society. Because TheRockGroup combines experienced business savvy partners and critical young energetic consultants, we have a well-balanced effective team.
Most certainly we have the passion for sustainability in common, with each team member contributing unique skills to achieve our overall goal: a more sustainable economy and society.
With experience in corporate organizations, SME’s, start-ups, knowledge institutes, NGO and government environments in the Netherlands and beyond as a result we are able to collaborate well with a range of different stakeholders. Furthermore, it gives us the capacity to provide the link between strategic business planning and ‘on the ground’-reality.
Together we form the building blocks of an experienced, enthusiastic, informal and well-functioning team.
Most certainly we have the passion for sustainability in common, with each team member contributing unique skills to achieve our overall goal: a more sustainable economy and society.
With experience in corporate organizations, SME’s, start-ups, knowledge institutes, NGO and government environments in the Netherlands and beyond as a result we are able to collaborate well with a range of different stakeholders. Furthermore, it gives us the capacity to provide the link between strategic business planning and ‘on the ground’-reality.
Together we form the building blocks of an experienced, enthusiastic, informal and well-functioning team.
Our Team

Elfrieke van Galen
Partner
Elfrieke van Galen has a legal background and extensive management experience in the logistics…
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Lettemieke Mulder
Associate Partner Belgium
For over 15 years, Lettemieke has lead cross-functional sustainability programs with triple bottom line…
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Karin Boomsma
Associate Partner South Africa
Karin has a background in B2B communication, creating concepts, project and campaigns that bring…
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Rosanne Alderliefste
Consultant
Rosanne has an educational background in European policy, European economics, human rights and environmental law.
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Sarah Gane
Consultant
Sarah is a French young professional, graduated in European Affairs and international relations.…
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Joris den Boer
Consultant
Joris has a background in economics, with a focus on the environment. After finishing…
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Cas Smitsmans
Consultant
Cas has an educational background in business administration. After obtaining his bachelor’s degree…
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Esther Mangiza
Consultant
Esther has a background in Environmental Management, with a focus on sustainability. After studying…
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Martin Clemens Villa
Consultant
After being born in Costa Rica and raised with dual cultures in…
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Lucas Steinbusch
Consultant
Lucas has a background in Cultural Anthropology and International Development Studies. Throughout his education…
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Clare Nichols
Consultant
Clare is one of TheRockGroup Africa’s Sustainability Consultants, with a lifelong purpose of
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Daphne Truijens
Consultant
Daphne’s heart starts ticking whenever societal and environmental challenges meet real impact.…
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Morgan Boast
Consultant
With an educational background in environmental science, Morgan has developed an understanding of the…
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Anouk van Oss
Consultant
From her teenage years, Anouk has made sustainability a priority and actively sought…
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Rixt van der Giessen
Consultant
During her bachelor, Rixt majored in Neurology and Psychology at Erasmus University College. Where…
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Pepijn Boom
Consultant
Pepijn studied Hotel Management at the Hotel Management School Maastricht, where he built…
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Linda Nouar
Marketing & Communication Professional
Linda has a background in Industrial Design, with a fascination and specialization in Social…
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Barry Verbeek
Consultant
Barry has a broad business background. He finished his Master’s in Business Administration and…
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Yitong Chen
Researcher
After working one year at TheRockGroup, Yitong decided to enrich her knowledge of risk…
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Tim ten Velde
Consultant
Tim is a former captain at KLM and has extensive experience working for the organization,…
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