The Weather Makers are a group of passionate and pioneering engineers, with a background in coastal engineering and multidisciplinary projects. Social awareness inspired us to use our technical knowledge, skills and professional network in hydraulics, morphology, meteorology, ecology, hydrology and economy to start The Weather Makers and act against the climate issues the world is confronting today.

Maddie Akkermans – Managing Director, co-founder

Commercial insight into market operations. A powerful personality with which results and decision-making arise. I take the foreground and see what is important for growth. Being part of an inspiring community where strength and talent are received with enthusiasm.

My career was first shaped at Graydon, where I evolved in 8 years from acquisition dealmaker to director sales US. The shaping of liaisons to empower business and put it in practice was also my work at NLE energy, Van Lanschot Chabot and Castanje.

My ambition is to empower the effective regreening of degraded areas and have fun and meaning by managing The Weather Makers.

Gijs Bosman – Technical Director, co-founder

After graduation at the TU Delft, I have been working for ten years in the maritime sector for a large engineering company, Royal HaskoningDHV. Over the years I have gained experience in a variety of maritime infrastructural projects in several countries abroad, including Ghana, Libya, Qatar, the UAE, Denmark, Bangladesh and Vietnam, but also a lot in the Netherlands for predominantly the Port of Rotterdam. I combine my technical knowledge with my management skills: pro-actively motivating a team, focus on the client’s needs, while maintaining a good overview on the main issues, quality of deliverables, the planning and costs of the project.

In 2017 we founded The Weather Makers, I saw a fantastic opportunity to use my coastal engineering skills and experience for regreening projects. Watershed wide ecosystem restoration origins at the coast, making coastal engineering and reuse of dredged sediments key to success.

Ties van der Hoeven – Creative Director, co-founder

Hydraulic Engineer (TU Delft), entrepreneur by heart with a strong drive to bring people together and an international mindset. I have work experience in Europe (including Russia), Africa, Asia and Australia. My main focus is to innovate projects in the field of sustainability, visualization, serious gaming (virtual reality and 3D), communication and engineering.

I’m an experienced Project Engineer, Project Manager Business Developer and Negotiator on large infrastructure projects as a consultant with Royal Haskoning and as a contractor at DEME. With proof of practice in design of hydraulic structures and contract preparation. Due to my work and my drive to travel, I’ve had the opportunity to see the world, which gave me insight of the world we live in.

After having worked on several big construction works, my interest shifted to working together with nature. This boosted my creativity and I started to implement a pro-active adaptive engineering approach. This helped me to learn to work with complex natural systems by simplistic modeling and monitoring. Working together with nature becomes a game of understanding and positive feedback loops.

Mohammed Nawlo – Business Consultant

Graduated from the Lebanese American University in Beirut – Lebanon. I have worked for over ten years in international management, have experience in commercial, corporate and retail banking. This has helped me gain global knowledge and perspectives on Middle Eastern and international affairs. It has also contributed to building my personal relationships and international network and my ability to work in a multinational environment.

As a Syrian, considering my cultural and professional background, I would like to implement my broad experience and knowledge and I am willing to function as a bridge between the Western and Eastern world.

Maarten Lanters - Hydraulic Engineer

In 2016 I graduated from TU Delft as a coastal engineer. During my studies I got more and more interested in combining the main purpose of the study, hydraulic engineering, with natural and social aspects. Focus on just the hydraulic engineering side of a problem might solve the short-term problem but on the long term natural and social aspects are key for every project.

My thesis was a research into the relationship between hydrodynamics and the fish population of Lake Bardawil. A dredging strategy was proposed in order to positively stimulate the fish population of the lake. This contributed as a steppingstone to The Weather Makers.

Pieter van Hout - Stakeholder Manager

My strong suit is finding synergy between people and their organisations. I always try to come to a win-win situation, whilst always keeping the main goal on what we want to achieve in this world in scope. Being very empathic and an includer allows me to connect with people with different backgrounds really well. I’ve used this talent in multi-stakeholder projects and programmes to achieve positive impact on our environment.

With a background in Human Geography and Planning at University of Utrecht (BSc.) and Climate Studies at Wageningen University & Research (MSc), I understand the engineers and am able to translate their technical analysis and advise to non-technical people. I bring knowledge of agriculture and the food system to the table, as I’ve gained a lot of experience in both my former job at an agricultural association as by being part of large networks such as the Climate Reality Corps, Slow Food Youth Network and KEK.

The beauty, complexity and connectivity of nature and ecology has always been a huge inspiration for me. Therefore, I am convinced that regreening our planet will benefit us all.


Rick van Bentem - Hydraulic Engineer

Geography and technology have always interested me, which is why I decided to study Civil Engineering at TU Delft. Here, I developed the technical skills that enable me to critically analyse complex projects today. During my studies I became more and more aware of the impact that climate change has on our current ecosystems.  I’ve decided that I want to use my skills to help make a change.

In 2019 I started at The Weather Makers as a student, working on my graduation project about the morphological response to Lake Bardawil adaptations. After completing my thesis and graduating from TU Delft as a coastal engineer I got the opportunity to continue to work on coastal development projects at The Weather Makers.  The work here perfectly aligns with the topics I have always been interested in and provides a chance to contribute to ecosystem restoration projects.

Eduardo Vias Torres - Ecological Engineer

Intrigued and fascinated by nature and its mechanisms since I was a child, I studied Biotechnology (TU Madrid) where I gained two years of practical research experience on plant-microbe interactions. To look at the current environmental challenges through different prisms, I joined the MSc on Water Technology by Wageningen University, having the chance of working in projects like the generation of renewable energy by salt gradient and the study of the prevalence of antibiotic resistance in our wastewater treatment processes.

My belief is that Ecology has a main role on providing societies with the most robust and resilient solutions. We can still step back and learn on how to reintegrate the ecological processes in our approaches and work together towards environmental justice. I want to dedicate the next steps of my career to do so, and in The Weather Makers I found the key drivers to do it: multidisciplinarity, passion and a clear vision.


Duke ten Velden - Ecological Engineer

I am driven by two things in particular. One, my endless curiosity and second, my long-held believe that a deeper symbiotic relationship between humanity and nature is necessary. I graduated in Ecology (UvA) and Architecture (TU Delft) and afterwards I worked on building projects in several countries, from designing and engineering them to even help in the build itself. Especially the ecological buildings projects were an eye opener for me, because it showed me how beautifully nature can complement our lives. Through these jobs I cultivated broad creative and technical skills and enjoyed collaborating with other people.


Being an ecological engineer at the Weather Makers is the perfect mix between my two degrees and I love working simultaneously as a researcher, engineer and even designer. Working at the forefront of ecological restoration projects is humble and an excellent place to study the processes that drive nature. After all, integration of nature in our daily lives can only happen once we understand and see its beauty.

The Weather Makers BV is a private company.

The Weather Makers are committed to make profitable projects happen with holistic engineering & nature based solutions with the aim to restore our planet.

The shareholders have agreed to use profits to enhance and enable the growth of our vision and empowerment of more projects.

In the legal structure also a foundation with ANBI status has been arranged. Reason for this additional entity is the financial possibilities towards investments in future projects or research in partnership with international foundations, funds and other entities.

Till today, the foundation is not used and has not received any funds. In case this situation will change we will directly communicate.

ANBI Profile The Weather Makers (Dutch only)