Meet the Team

We are a team of dedicated professionals, ready to do what ever it takes to make your business grow

Wouter van Wagtendonk

Wouter van Wagtendonk

Owner

Accomplished and results-driven professional with more than 20 years extensive onshore and offshore experience in the construction industry.

Demonstrated success in driving project management life-cycle from tender, planning, and mobilization, to monitoring, control, and offshore execution. Adapt at mitigating project risks, designing systems, defining KPIs, and negotiating contracts. Ability to harness talents of teams, manage project at micro- and macro-levels, adjust to the challenges presented, and deliver on promises. With in-depth knowledge of construction installation techniques to recognise challenges impeded in theoretical and practical execution.

Ferry Sanders

Ferry Sanders

Owner

Ferry has 20+ years’ experience in the offshore & maritime industry. After completing the Harbour Management College, he started as boarding clerck at a small but famous shipping agent in the Port of Rotterdam.

After that he worked for various major companies in the maritime & offshore industry and has great knowledge and experience in vessel management and marine services.

He is still very much involved in the daily operations beside of managing the company together with Wouter.

Nikolaos Malissovas

Nikolaos Malissovas

Engineering Director

With his strong academic technical qualifications and proven experience in the Offshore Industry, he will add great value for all our internal and external engineering needs, being able to lead both project preparation and execution phases. He is the focal point of contact for engineering services.

Nikolaos and the team in our newly opened Athens Office are able to tackle any engineering challenge towards the energy transition in the East Mediterranean Region.

Erica Etman-Tieman

Erica Etman-Tieman

Executive Assistant

Erica started her Tresios career as Crew Coordinator and Event Organiser. She managed over 40 crewmembers in international mob- and de-mob works. Her priority role nowadays is Executive Assistant. She also has a company-wide support function.

She has over 30 years’ experience in, among others, organisation, planning and administration. Her communication- , organisation- and service skills as well as her social abilities make her a valuable asset to the Tresios organisation.

She is a highly motivated and involved employee who does her utmost to support the Tresios Staff as well as our estimated clients and crew.

Brian Esmeijer

Brian Esmeijer

Finance Manager

Brian is responsible for all our financial reports. With his extensive knowledge he delivers the tools to make sure our financial numbers are well organised and the correct cost calculations are made to controll our budgets.

Mariëtte van Rijn

Mariëtte van Rijn

Crewing Manager

Mariëtte has 10 years of experience in international crewing for the maritime and offshore industry. A proven track-record and a worldwide network of professionals to best serve our vessels, clients and crew.

Eleftherios Stratos

Eleftherios Stratos

Commercial Manager

With his international background in Sales and Construction, we believe that Eleftherios will be a strong asset to our Greek office, to serve our customers and prospects at the highest level.

Eleftherios will be responsible for all Business Development and commercial activities in Greece and the Eastern Mediterranean.

Ruben van Ooijen

Ruben van Ooijen

Project Engineering Manager

Ruben is a professional with over 20 years of experience in the offshore construction industry. Focus on engineering assessment, and offshore installation techniques. His approach utilizes a range of tools and techniques to deliver end-to-end solutions.

There is always a need for skilled personnel with expertise. With his background and network in the offshore industry, he is able to pinpoint the client’s pain and accommodate the need.

Jelle Meijer

Jelle Meijer

Operations Specialist

Jelle is a specialist who recently graduated from the Higher Maritime Institution as Maritime Officer. Jelle supports the team on all Maritime operational matters.

Dennis Jongeling

Dennis Jongeling

Strategy & Innovation Officer

With his technical background and commercial experience Dennis will form a bridge between engineering and innovations.

He will look for opportunities and initiate innovations for Tresios to claim new positions. A good addition to compliment our ambitions and strategy in the energy transition.

Dimitris Karras

Dimitris Karras

Lead Engineer

Dimitris is an offshore and civil structural engineer with a very strong theoretical and technical background. With his extensive engineering and construction experience in both offshore and onshore projects, he can provide customized solutions based on project needs. Dimitris leads the structural engineering department at Tresios.

Antonis Klavdianos

Antonis Klavdianos

Project Engineer

Antonis is a highly motivated, dedicated and hardworking project engineer with a strong background in structural engineering. He is passionate about using efficient structural design to deliver high quality shore and offshore projects.

He has been involved as a Field Engineer with the Tresios team on the installation of a 48" pipeline project, including AWTI work.

He has always set ambitious goals to be the best he can be at any given time.

Ioannis Maranos

Ioannis Maranos

Project Engineer

Ioannis has a Msc. in Civil Structural Engineering and gained extensive experience in retrofitting the structural design of existing buildings and supervising various types of buildings and structures in the private sector.
The variety of projects have allowed Ioannis to work in a structured manner and to think with a critical mind. Ioannis likes to challenge himself with projects of high complexity.

Stergos Kotakis

Stergos Kotakis

Project Engineer

Stergos is an experienced and very motivated Civil Engineer with a demonstrated history of working in the construction industry. With his strong theoretical and technical background, he can deliver high-quality projects with the most efficient structural solutions according to the project’s needs.