Executive board

Luitze Perk MSc

Luitze Perk is Director Coasts & Seas at WaterProof BV. Luitze is a coastal engineer who graduated from Delft University of Technology in the field of Coastal morphodynamics.

Luitze’s core technical experience includes hydrodynamic, water quality, and morphodynamic studies. During his career, he has been involved in setting-up, calibrating and validating numerical hydrodynamic and morphodynamic models for shallow coastal seas and estuaries all over the world. He worked on numerous coastal development projects where he determined the effects of interventions on, among others; hydrodynamics, morphodynamics, density currents, re-circulation, wave penetration and nautical aspects.

As a member and later head of the hydro- and morphodynamic modelling team at ARCADIS, he has gained extensive knowledge on the consequences of interventions in coastal regions and estuaries. Based on his expertise in modelling, Luitze now provides specific advice in the field of coasts as Advisor Coastal Projects. Besides, Mr. Perk has been involved in numerous port related projects, located all over the world, where he further developed his knowledge on nautical aspects. These projects and others have additionally shaped Luitze’s project management experience.



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Roelant Snoek MSc

Roelant Snoek holds the position of Director Acoustics & Marine Services at WaterProof BV. He studied Biology at the University of Groningen and graduated as a marine biologist. In the last years, he specialized on underwater acoustics in relation to offshore activities such as seismic exploration, pile driving, dredging operations and cable routing. Roelant has been working on environmental impact assessments for offshore winds farms in the North Sea. He is part of the Dutch Working Group on Underwater Sound, which defined an assessment methodology related to acoustics for offshore pile driving, including propagation modelling and defining criteria for threshold levels for marine mammals. In the past years, he conducted several offshore underwater acoustic measurement campaigns related to offshore activities and ambient noise.

By managing and conducting various national and international measurement campaigns, Roelant acquired extensive experience in the most optimal measurement campaign setup and strategy. This includes efficient equipment setup, to ensure the highest quality measurements. Health and safety aspects during measurement execution formed a key expertise within his projects. BOSIET & OPITO/HUET certified.

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Marijke Olivierse Ba

Marijke holds the position of Project assistant Coasts & Sea, Office manager and QHSE manager at WaterProof BV. She studied Integraded Coastal Zone Management at Van Hall Larenstein in Leeuwarden. For her final thesis, she studied the effect of underwater acoustics resulting from simulated military active sonar on the behaviour of marine mammals in the Norwegian Lofoten area.

At WaterProof, she deals with a wide variety of business support tasks as well as project specific activity’s. Marijke is part of our GIS team, she develops insight into PAM (Passive Acoustic Monitoring) analyzes for the detection of marine mammals, contributes to fieldwork projects and sails our measuring ship the Bumblebee

As QHSE manager, Marijke designed and implemented our Quality and Environmental Management. With this system, we have been ISO 9001: 2015 and 14001: 2015 certified since 2017. She ensures the quality of our projects by monitoring that our quality procedures are followed at all times.

She arranges the aspects for the safe execution of measurements at sea and ensures that all our projects are carried out according to our Health and Safety plan. Currenty, she is working on the ISO 45001:2018 Healthy and Safe Working certification.




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Elmire Dijker

Elmire works at WaterProof as an all-round secretary. She was trained as an executive secretary at Schoevers. Last year she also completed the first year of Human Resource Management. Before WaterProof she has worked in different sectors at different places is organizations, so she has gained a lot of experience in the secretarial and administrative field. At WaterProof she will mainly support management an the office manager in setting up, maintaining and executing the business processes.

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Nathanaël Geleynse PhD

Nathanaël Geleynse holds the position of Advisor Coasts and Seas at WaterProof BV. Nathanael is a Physical Geographer by training and has been involved in projects on coastal projects for many years now. After studying Physical Geography at Utrecht University, he obtained his doctorate at Delft University of Technology on the formation of river deltas. He has worked as a postdoctoral researcher with the National Center for Earth-Surface Dynamics, USA, where he contributed to the development of methods for coastline detection from bathymetric data sets as well as from satellite imagery, among other research.

As a technical expert, he has contributed to many different studies, ranging from the development of hydrodynamic models for the design and evaluation of primary water defences to providing expert advice on capital and maintenance dredging associated with harbour and channel development and management. Recently, he has been involved in studies preparing for the development of future models within the Dutch legislative framework for primary water defences as well as he has been involved in the design of the (New) Afsluitdijk.

Nathanael values a good collaboration with the different partners to enable the definition of the best solutions for the problem at hand. For example, as a technical advisor he has collaborated with the Frisian Water Board on the first evaluation of the water defence system at the barrier island Schiermonnikoog in the Dutch Wadden Sea. From his academic background, Nathanael enjoys working with researchers and students to allow for the integration of the latest research findings in the daily engineering practice and to enable knowledge transfer.

At WaterProof BV Nathanael works within the golden triangle of field experiments, computational models and laboratory models on various studies with a focus on fluid dynamics, waves, salt intrusion, oil spills, sediment transport and morphology.




Joost Brinkkemper PhD

Joost holds the position of Specialist Coasts and Seas at WaterProof BV. He graduated in 2013 from the master Physical Geography at Utrecht University with a specialisation in coastal dynamics and fluvial systems. During his graduation research, he focused on wave non-linearity in the shallow coastal zone and during an internship at the LIPC coastal instate in Merida (Mexico) he worked on wave run-up at the local beaches. After his master, Joost continued his career at Utrecht University as a PhD candidate, studying sand transport in the surf zone. He obtained his PhD degree in March 2018. During his time at Utrecht University, he gained much experience in collecting and analysing field data and working with several numerical models.

At WaterProof, Joost is involved in a wide variety of subjects. He works on hydrodynamic and morphodynamic studies in the coastal zone, but he is also heavily involved in projects concerning underwater acoustics. As Joost has experience with both numerical models as with executing field measurements, he is also often involved in field campaigns. Therefore, Joost is at the moment often found at sea for collecting measurements of underwater acoustics, and those measurements are also analysed by himself after returning to shore. Joost is BOSIET & OPITO/HUET certified.

During his career, Joost published many of his results in scientific journals.


Kimberley Koudstaal MSc

Kimberley Koudstaal holds the position of Specialist Coasts & Sea at WaterProof. She is a coastal engineer who studied Hydraulic Engineering at the Delft University of Technology, where she specialized in Coastal Engineering. During her master thesis at Deltares, she studied the roles of high and low frequency waves on wave run-up at an intermediate beach in South-Korea using XBeach. Apart from that, she spent two months in Chile as part of a multidisciplinary team to contribute to the development of a new road project in the town of San Pedro de la Paz. Here, she was mainly involved in studying how the different variants scored in the event of a tsunami with the help of the numerical model NEoWave.

At WaterProof, Kimberley mainly deals with numerical modeling and data analysis of hydrodynamics and morphodynamics, both in the coastal zone and offshore. For example, she has carried out various burial depth studies and optimizations by means of data analysis for the electricity cables to the planned offshore wind farms, such as HKZ, Borssele and IJmuiden Ver. In addition, she is involved in setting up, calibrating and validating various numerical models, both hydrodynamically and morphodynamically. Examples of these models and studies are Delft3D and SWAN for siltation studies for ports worldwide, Delft3D FM for optimizing the design of the Dutch Fish Migration River, and XBeach for the study of the reinforcement of the Prins Hendrik dike. The latter study has also led to a publication in the Journal of Marine Science and Engineering, of which she is a co-author.

In addition, she supports the work in the laboratory in determining sediment characteristics, which she applies in the numerical models.



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Marcio Boechat Albernaz

Marcio is an oceanographer and coastal engineer that joined our team as a Specialist in Coasts and Seas.

Marcio has a strong background in coastal-fluvial morphodynamics across both academy and consultancy. He has strong knowledge on the natural systems and is a skilled hydro-morphodynamic modeler that is also well acquainted with sediment analyses, field work, data analyses and physical experiments. He studied Oceanography at UNIVALI-Brazil, worked as an intern at the Geological department of Boston University-USA, and studied Coastal Engineering from the Erasmus Mundus CoMEM MSc program at NTNU-Norway, UPC-Spain and TU Delft-the Netherlands where he graduated in Civil Engineering. He joined Tetra Tech Brazil with technical and management roles in coastal-environmental consultancy to fulfil clients’ demands in environmental-morphodynamic projects, design of coastal structures, shallow water geophysics, dredging activities, marine pollution and water-sediment analyses. Marcio is now completing his PhD in Physical Geography at Utrecht University-the Netherlands where he focused on the long term eco-morphodynamic development of coasts and estuaries (see video).

Due to this comprehensive background, Marcio joined WaterProof as an all-year-round player. He works on solving clients’ demands on coastal-hydraulic engineering and hydro-morphodynamics with holistic approaches encompassing data analyses, numerical modelling and physical experiments combined with his strong knowledge on the natural processes while focusing on the clients’ needs.

During his career, Marcio published many of his results in scientific journals and presented his work at well-known conferences worldwide.

BOSIET & OPITO/HUET certified.



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Koen van der Laan MSc

Koen van der Laan holds the position of Junior Specialist Coasts & Sea at WaterProof. He graduated in 2017 from the master Marine Sciences at Utrecht University. During his graduation research at the Faculty Geosciences and the Institute for Marine and Atmospheric research Utrecht (IMAU), he studied the effects of changes in the ocean circulation on surface water temperatures in the Golf of Guinea during the Pliocene and Miocene. In a guided research at the Netherlands Institute for Sea Research (NIOZ) he analysed the spatio- and temporal variability of the volume- heat- and freshwater transport of the Irminger Current from field measurements and reanalysis data. This research took place as part of the Overturning in the Subpolar North Atlantic Program (OSNAP), which aims to quantify the strength and variability of the Atlantic Meridional Overturning Circulation.

At WaterProof BV. Koen deals with numerical modelling and data analysis of hydro- and morphodynamics in the coastal zone.

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Donné Mathijssen MSc

Donné Mathijssen works at WaterProof as Project Officer Coast & Sea. He graduated as a marine biologist from the University of Groningen in the summer of 2020. During his graduation project, Donné has focused on the ecological consequences of overfishing of apex predators at lower trophic levels and habitat structures. For this project, Donné worked continuously for two months in the intertidal areas of the Bijagós archipelago (Guinea-Bissau) off the coast of West Africa. Within this project, Donné has been able to combine his experience in field monitoring and sampling with quantifying data analyzes, modeling sediment properties and spatial visualisations using GIS.

At WaterProof, Donné is primarily concerned with monitoring and reporting underwater noise during the works of the Fehmarn Belt Tunnel between Rødby and Puttgarden. In addition, Donné contributes to other projects through data processing and analysis. Donné is BOSIET & OPITO / HUET certified.

Daan Nieuwendijk Ba

Daan holds the position of Project assistant Coasts & Sea at WaterProof BV. In 2014, he completed the CIOS Water Sports course where he gained knowledge and practical experience concerning sailing and navigating on open water. After this, he completed the Coastal Zone Management study at the Van Hall Larenstein University of Applied Sciences in Leeuwarden.

As a result of his minor Marine Biology and completed internship at Bureau Waardenburg, Daan gained sufficient knowledge of the Dutch coastal ecosystem. During his internship he studied the effects of kite surfing on coastal birds at Maasvlakte II and participated in field monitoring and data processing through GIS analyses.

Since 2019, Daan works as all round fieldworker and offshore surveyor (BOSIET OPITO/HUET certified). He manages our measuring instruments, carries out maintenance and sails our measuring vessel the Bumblebee measuring. Daan is also part of our GIS team.


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Lykele Pool

Lykele holds the position of technical specialist at WaterProof. He has over thirthy years of technical expericience in several different workfields.

Lykele is our technical specialist and is recently trained to conduct surveying work offshore as well (BOSIET OPITO/HUET certified). He can set-up equipment and provide the necessary technical hands-on support on site. In the last couple of months, Lykele has conducted noise measurements at an offshore platform in the North Sea and at the installation of the Borssele OWF on behalf of the Dutch government.





Janneke Krabbendam MSc

Janneke is a PhD candidate at WaterProof BV. and the Institute for Marine and Atmospheric Research (IMAU, Utrecht University). She is supervised by Prof. Dr. Ir. Huib de Swart and Dr. Ir. Abdel Nnafie. Janneke studied Climate Physics at Utrecht University and did her final graduation research (with the same supervisors) also at WaterProof. Her graduation research focused on modelling finite amplitude tidal sand waves using Delft3D. Among other things, this research focused on studying the influence of different environmental parameters on the characteristics of tidal sand waves and the recovery of sand waves after a disruption caused by e.g dredging.

The PhD project is a logical continuation of her graduation research and focuses on developing new, process-based knowledge and methods that will strongly improve assessments of burial depths of cables and pipelines in areas of the North Sea where active tidal sand waves occur. This PhD project is part of the Industrial Doctorates program of NWO (Netherlands Organisation for Scientific Research), in which PhD candidates carry out their research at both a university and a participating company.




Our partners

Besides our own staff, we also closely cooperate with our partners.

prof. dr. Leo van Rijn

Prof. Dr. Leo van Rijn is an independent consultant since his retirement in 2011 from Delft Hydraulics/Deltares and the University of Utrecht and has over 40 years experience in basic hydraulics (river, tidal and coastal flows), sediment transport and morphology of rivers, estuaries and coasts. He has participated as a team member and as project manager in many hydraulic and morphological studies in the Netherlands and abroad, using both physical and mathematical models. Various mathematical models have been developed to compute the sedimentation of channels and basins. Another activity has been the development of instruments for measuring in-situ velocity and sediment transport in rivers, estuaries and coastal seas.

He has written five books about fluid mechanics, morphology and sediment transport:

- Principles of fluid flow and surface waves in rivers, estuaries, seas and oceans (1990,2011);  
- Principles of sediment transport in rivers, estuaries and coastal seas (1993, 2012);
- Principles of coastal morphology (1998);
- Principles of sedimentation and erosion engineering in rivers, estuaries, coastal seas (2005, 2012);
- Manual of sediment transport measurements (1986, 2007).


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Michel van Staveren

After graduating from technical college (electronics, electrical engineering and computer science), Michel van Staveren worked in the process industry, the semiconductor industry and as a RD&E software developer. He founded Jato Cleanroom Supplies in 2007. Due to his activities as a RD&E software developer, he has extensive experience in all aspects of innovative control systems, measurement sensors and their applications. Since 2015, he collaborates with WaterProof on the development of the prototype buoy JaT01. This prototype is a scalable platform with a wide choice in components. Depending on the application, different forms of sensors, energy supply (batteries, with or without solar panels) and various communication options (Lora, GPRS or satellite) can be chosen.


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Gijs van Banning MSc

Mr. Van Banning is Senior Adviser Hydro- and Morphodynamics at WaterProof Marine Consultancy & Services BV.

Gijs is a Civil Engineer, with specialism in fluid dynamics, he is always looking at challenges on the edge of science and practical application. He has a positive and eager attitude towards work. He enjoys his work. An open atmosphere and respect for everyone is his basis.

Working for almost 40 years in the field of complicated hydro-and morpho-dynamics should have made him a specialist in these fields. Well he knows, but he is still learning.

The understanding of the 3D physics of nature and the simulation of its behaviour in numerical models is his expertise. Keywords: tides, waves, salt fresh water interaction (gravitation circulation), cohesive and non-cohesive sediments, rainfall runoff, temperature and salinity, intakes and outfalls, refreshments, water quality, erosion and deposition, scour, hurricanes and tsunami modelling. Interaction between atmosphere and water.

Gijs is a part time Senior Advisor to WaterProof. He has worked as a team member and as Project Manager all over the world in large numbers of port and coastal projects, mostly with the emphasis on the mathematical modelling of hydrodynamics and morphology. Gijs gave regular guest lectures at the Technical University of Delft.

Rinse de Swart MSc

Rinse de Swart worked during 2016 and 2017 as Junior Specialist Coasts & Sea at WaterProof BV. He studied Physical Geography at Utrecht University, where he specialized in coasts and estuaries.

At WaterProof BV., Rinse mainly worked with numerical modeling and data analysis of hydrodynamics and morphodynamics in coastal zones. He was involved in the burial depth study for the electrical cable between Borssele (near Vlissingen, Netherlands) and the Borssele wind farm and the salt marsh study at the island of Terschelling.

In addition, he continued the development of the wave measuring buoy and took a first step in reducing the knowledge gap regarding the effects of electromagnetic fields of high voltage cables at the bottom of the North Sea on the underwater life.

Currently Rinse is employed as a PhD student at the Coastal Morphodynamics research group of the Universitat Politècnica de Catalunya in Barcelona. The main research topic is how coastal morphodynamic patterns are affected by the interactions with processes at different spatio and temporal scales. From that position, Rinse / Universitat Politècnica de Catalunya advises us in our morphological projects.