Wietse van der Werf

Founder, CEO
Wietse founded the Sea Ranger Service in 2016 after having worked at various international conservation organisations in more than 10 countries over 20 years yet seeing an opportunity for a more pragmatic approach to increasing conservation capacity. His work approach has been widely celebrated as an innovative model which brings together public and private partners to realise necessary ‘boots on the ground’ for increased environmental protection.

Currently responsible for the company’s overseas expansion, Wietse is building a global network of governments, agencies, investors and entrepreneurs to scale the work of the Sea Ranger Service and its social and sustainable impact. Wietse is also involved in the recruitment and training of new Sea Ranger Service franchisees and leads the international Sea Ranger holding company.

Eric Schunselaar

Chair of the Board
Eric is a Rotterdam entrepreneur and owner of diving school Het Duikhuis. After years of working in the investment industry, he now manages the Sea Ranger Service with his financial expertise.

Rachel Terry

As a Civil and Coastal Engineer by training, Rachel combines a technical background with the personal purpose of contributing to a better world. With a background in maritime and offshore (wind), she is currently Head of Sustainability at Van Oord; using their capabilities to create a sustainable future.

Rachel likes to keep her focus on projects which enable her to work towards her purpose, which is why joining the board of the Sea Rangers Service Foundation is a perfect fit.

Originally from the UK, Rachel now lives in Rotterdam with her family.

Riemert Moleman

Riemert has worked in a maritime environment for the past 37 years. Starting in the navy, then switching to safety training for the maritime industry. For ten years he was responsible for operations at the KNRM (Dutch offshore lifeboat organisation) and is now back in the field of safety training as director of STC-KNRM in Rotterdam. Developing, maintaining skills, and safe sailing with small fast boats, runs through Riemert's working life as a common thread. He fully endorses the mission and vision of the Sea Ranger Service and supports the organisation with his professional expertise.

Effie Baert

Chief Development Officer (CDO)
Having a strong entrepreneurial spirit, Effie started her own company while still at University. Working for various clients in the cultural and sustainable food sector, she developed herself from production assistant to project manager. She has additionally worked for different start-ups and has set up her own project, championing young word artists by giving them a stage when nothing like this existed at the time. Across all aspects of her work Effie focusses on making connection and looking for ways we can learn from one another. Her strong belief is that together we are greater than the sum of our parts and joy and wisdom are found in our journeys together.

After four years of building and further developing the Sea Ranger Service as its General Manager, Effie now heads our international expansion through the development of our franchise model. She is further responsible for our franchising programme and its ongoing development. Selecting and training new franchisees, giving ongoing support, building the community and making sure innovation is spearheaded are all part of her daily activities.

Ruud Smorenburg

Head of Finance
After years of working as a Financial Director for companies in the semiconductor, offshore and food industry, Ruud is now involved in the further professionalisation and international expansion of the Sea Ranger Service. Ruud has a broad, varied interest and a background in botany are the inspiration for me to work at the Sea Ranger Service.

Sanne Boekhoff

Head of People
As our Head of People, Sanne is responsible for everything to do with people at Sea Ranger Service. This ranges from organising good employment conditions to coaching Sea Rangers and building partnerships with other employers in the maritime sector. With a background in Organisational Psychology, Sanne sees the potential of people and helps our Sea Rangers to discover their talents and possibilities.

Next to working at Sea Ranger Service Sanne prefers to spend her time at the sea surfing, swimming or just enjoying the beach. During her travels she has seen up close how beautiful our world is and how important it is to take care of our oceans. With her passion for people and love for the ocean, Sanne and the Sea Ranger Service are a match made in heaven.

Dan Benham

Head of Communications
Having been active in the creative industry for 15 years, Dan has worked with charities and ethical organisations of all sizes. During the pandemic he co-founded a social enterprise to help young people find work. His interest and passion for sustainability and environmental issues has lead him to his role at the Sea Ranger Service, as a way to have more of an impact on the world and create a positive future for the coming generations.

Kees de Vries

Head of External Affairs
Former director of one of the Netherlands largest maritime employers organizations. With this professional background, Kees is now an integral part of the Sea Ranger Service and coordinates external relations with government agencies and investors.

Wik Becker

Project Lead Shipbuilding
After receiving his degree in Mechanical Engineering from Delft University of Technology, Wik followed his heart and continued his education as a film and TV director in England. Returning to The Netherlands, he started a career as a television director and later founded a tv-production company. After the sale of this company, Wik has held various positions in the creative industry at management and board level.

During the later stages of his career, Wik’s main drive is to make a contribution to society and the environment, while working with others, helping to unlock other people’s talents. As a dedicated racing sailor Wik has travelled many miles on lakes, seas and oceans. By putting his passion for the sea and his experience and knowledge together, Wik is delighted to contribute to the vision and mission of the Sea Ranger Service.

Willempje Vrins

Bootcamp Producer
Willempje is an experienced project manager with a demonstrated history of working in the sports, tech and social innovation industry. She founded her own boxing school, worked for various clients as a game producer and was the club manager of a coworking space. Her working history has been an adventure of building networks and getting people to move forward (both metaphorically and literally). She is here now to organise the Sea Ranger Bootcamp.

Sophie Hankinson

Project Coordinator Seagrass Restoration
As she loves to be outdoors and studied Sustainable Development, Sophie found a job that fits perfectly with these two interests. When she is not working at the Sea Ranger Service, you can find Sophie training in Krav Maga, practicing photography, jogging, surfing, or sitting in a comfy chair with a good book.

Ed Bergman

Bootcamp Leader
After leaving school Ed joined the Marine Corps and served there in various positions for 37 years. After this he started his own company in obstacle runs and giving bootcamp lessons. Ed now works with our future Sea Rangers as our Bootcamp leader.
Pieter de Haas

Pieter de Haas

Social Worker
People in nature, nature in people. These are the principles that Pieter applies as a social worker/mental coach at the Sea Ranger Service. All team members can approach Pieter for inspiration, coaching and advice. This enables them to fully deploy their talents for nature and the environment all over the world.

Ton Lukassen

Bootcamp Instructor
As a sports instructor at the Ministry of Defence since 1978, Ton has worked outside in nature all his life. Conducting exercises in Canada, Sweden and Curacao among others with mostly young people, was the ideal preparation to guide the Bootcamp as an instructor.

Teale Phelps Bondaroff

Dr. Phelps Bondaroff is an expert in illegal fishing, and his work has played a central role in efforts to redefine illegal, unreported and unregulated (IUU) fishing as organized crime. Located in beautiful British Columbia (Canada), he gladly applies his extensive research skills to support the work of the Sea Ranger Service.

Onno Nieuman

Liaison Den Helder
After more than 30 years in the Royal Dutch Navy, Onno is still not done with the oceans. As liaison within walking distance of our operational base in Den Helder, he is our helping hand for all kinds of support needed. If he is not working, he also likes to go out to sea on his own sailing yacht.

Sinem Akgün

Assessment Psychologist
How do you make sure you select the right people for your starting organization? Gutfeeling is important, but the verdict of an assessment psychologist also counts heavily for us. With a lot of fun, sharp questions and practical experience, Sinem Akgün-Smit has been supporting us for quite some time when it comes to selecting the best people!

David Huiberts


Jan-Willem Tetteroo


Koene Oberman

After his retirement as Commander from the RNLN, Koene started sailing as a captain on various traditional sailing ships. Being able to support and train young people with his experience whilst working to protect the sea he loves motivated him to join the Sea Ranger Service.

Josefien Krijgsman

First Mate
Josefien exchanged horsepower for windpower, because her education to work with horses didn't bring what she was looking for. She gave up her job as a waitress when she could start sailing at the Sea Ranger Bootcamp. She just wants to feel the wind in her hair every day!

Enrico Köpke

Rating Deck

Thierry van Veggel

Senior Sea Ranger
Although he was working his passion making cocktails behind the bar, Thierry knew he had to shake things up even more in his life. As soon as he found out about the Sea Ranger Service he listened to his inner compass and signed up. Now, he is proudly wearing the title of Senior Sea Ranger and finally working where he wanted to be for years: at sea.

Mathieu Van Steenberghe

Senior Sea Ranger
As a surfer, it comes naturally to Mathieu to concern himself with the welfare of the ocean, and everything that relies on it. Now, he can put his abundance of energy into the Sea Ranger Service, and contribute to change on a bigger scale.

Ise Grimm

Sea Ranger

Julia Kuipers

Sea Ranger

Bart Maarsen

Sea Ranger

Giulia Kuhn

Sea Ranger

Roosje Lubrechts

Sea Ranger

Elise Chalcraft

Sea Ranger

Marius Molenaar

Sea Ranger

Christa van Oorschot

Sea Ranger