About us

Perpetual Next is powered by an international team of extremely driven professionals. Being it C-level or researcher, we have a few things in common: we are highly experienced, entrepreneurial in nature and devoted to making a change.

Each and every one of us has made it his or her mission to solve fossil-resource reliance and a culture of depletion and waste – by transforming these into renewable and valuable cycles.

Our future is Perpetual.


Martijn van Rheenen – CEO

  • Martijn van Rheenen is founder of Momentum Capital (2005) and SemiFest (2019) and CEO of investment platform Perpetual Next. As a self-made man he is also a speaker, serial-entrepreneur and motivator. Martijn is dedicated to create value for the companies he invests in with only the best people that are dedicated to changing an industry or market for the better.

Erik Huis – Non-Executive Director

  • Erik Huis, as an entrepreneur with over 25 years of international experience in the fossil energy sector with a focus on industry & technology, can quickly respond to opportunities, knows how to connect and form the right teams to capitalize on those opportunities, creating value for organizations, investors, and wider society. In 2012, Erik joined forces with Momentum Capital to build a sustainable energy portfolio what has become now Perpetual Next. Erik holds a MBA degree from Fox School of Business, Temple University, Philadelphia, USA.

Rene Buwalda – Executive director, COO

  • Rene Buwalda is a COO with a broad technical background. His career started over 25 years ago in the power generation sector. Rene worked in senior positions in developing, engineering and production facilities and later as a senior project manager and project director in several complex international energy projects. Rene is a natural leader in multidisciplinary teams and he uses his strategic thinking to engage with partners to realize successful and ambitious projects.

Maarten Gnoth – CCO

  • Maarten is a driven and well-versed business development and sustainability executive and entrepreneur with a 20+ years international track record. Maarten is experienced in M&A, finance and joint-venture development with board positions held in various joint-ventures and foundations. He has in depth experience in international business development, sustainability and consultancy in renewable energy. He is also a seasoned expert in organic waste streams to energy, bio supply chain management and in organic waste (wood and agri-residues) pelletization as well as in environmental and social responsibility within the energy sector. Maarten is an experienced director of two industrial pellet plants and a wood chipping facility. Maarten holds a M.Sc. Degree International Technological Development Sciences (ITDS), Social Sciences & Industrial Management at Eindhoven University of Technology, the Netherlands and a B.Sc. in Automotive Engineering Technology.

Martijn van Kleef – Corporate Finance

  • Martijn van Kleef is an energetic and passionate team player. With a broad background and over 15 years of experience in banking and wealth management, he combines his analytical skills with his acquired knowledge of investing. This results in a positive critical attitude, always looking for opportunities and the common interest. Martijn holds a MSc degree in business economics from the University of Amsterdam and followed various investment programs.

Ramón Boekhoff – Corporate Finance

  • The use of unique opportunities that makes a genuine contribution to our society is the most important motive in Ramóns work. He finds it fantastic that he meets a large number of different companies and entrepreneurs. This has been a recurring theme throughout his employment history and life, professionally and privately. Being a pivotal function in which the parties involved both benefit, gives him endless energy!

Meity van der Stokker-Heesbeen – Management Assistant

  • Over the years, Meity has been able to develop in various industries and positions. She has gained broad knowledge and experience and can therefore think along in the organization at various levels. She likes to be in contact with people and gets satisfaction from taking care of things well, providing clear communication and working on improvement and efficiency.

Albert Fischer – Sr. Advisor to the Board

  • Albert Fischer is passionate about promoting sustainability through building young and innovative companies. He has over 25 years of experience in venture capital and management in the Netherlands, United Kingdom and Switzerland. Over the course of his career he has invested in 22 companies focusing on sustainability and clean energy, and has divested from many of these in the form of a trade sale or through a public listing (AIM and NASDAQ). Albert holds a PhD degree in Physics from Leyden University and followed executive education programs at the Amsterdam Institute of Finance and IMD Lausanne.

Eija-Riitta Korhola – Sr. Advisor to the Board

  • Dr. Eija-Riitta Korhola is a former member of the European Parliament (1999-2014). She has more than 15 years of experience in European lawmaking, especially in the field of energy, climate, environment and the internal market. After defending her doctoral thesis on climate politics she served as a visiting senior fellow at Tsinghua-Brookings in Beijing and as as a delegate of the consultative committee on industrial change in the EESC, European Economic and Social Committee. She is also a member of the steering committee of Japanese climate initiative ICEF, Innovation for Cool Earth Forum. Prior to becoming an MEP she worked with development aid, journalism and business consultancy. She is an active blogger and has written several columns and books.