Meet the team

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

Rotterdam office

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.

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.

Arjenne Koster-Vroegindeweij

Arjenne Koster-Vroegindeweij

Business Unit Manager Crewing & Careers

From Crewing to Account and Business Development Manager: Arjenne knows her way around in the maritime and energy sector and has build a strong and large network over the years. Her commercial and social skills will certainly help her in her position as Business Unit Manager Crewing & Careers at TRESIOS.

Denise Bosma

Denise Bosma

Consultant Crewing & Careers

Denise graduated from her Hotel Management degree last year, after which she continued working in the hospitality sector. Starting at TRESIOS as a Consultant is a big switch but also the start of a journey to get to know and develop a new side of herself.

As a Consultant she will be in the Crewing and Careers department where she will be matching clients with candidates. She’s really looking forward to this new challenge!

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.

Phillip Owen

Phillip Owen

Head of Quality

With over 12 years of experience in the energy sector (oil and gas) in the field of quality, Phillip is perfectly equipped to lead the QA & QC Services as Head of Quality. In 2009 he started as Quality Document Controller and since then he has developed within his field of expertise on various senior positions like Quality Management and Quality Engineering.

Through his experience he developed a strong health and safety awareness making him a very respectable and valuable asset.

Jelle Meijer

Jelle Meijer

Marine Services Officer

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.

Athens office

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.

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.

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.

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.

Maria Pantazopoulou

Maria Pantazopoulou

Project Engineer

Maria is a Civil Engineer who graduated with a specialization in structural engineering. As part of her degree, she was provided with a solid background regarding all aspects of civil engineering practice like structural, geotechnical, hydraulic, transportation and construction management.

She’s very ambitious and highly motivated to contribute to the teamwork and company’s success by delivering structural solutions in all variety of both offshore and onshore projects.

Georgia Akrivaki

Georgia Akrivaki

Project Engineer

Georgia is a MEng Civil Engineer with already 5 years of experience in the field of civil engineering and with a strong technical and analytical background in doing structural analysis, and sewage network studies.

Within TRESIOS, Georgia is seeking a career which specializes in the construction field, both on- and offshore, where she can further develop her analytical and technical skills. With a bunch of enthusiasm and motivation she’s determined to contribute to team’s and the company’s success.

Akis Golemis

Akis Golemis

Project Engineer

Akis is an Offshore Civil Engineer with a master’s degree in Civil and Offshore Engineering. Throughout his academic years he developed a firm and solid background, enriched by his work experience, for an engineering company and the Greek army a.o., in designing Renewable, Marine and Coastal Structures.

With his strong knowledge of Marine Engineering, Hydraulics and Data analysis, he acquires both the technical as well as the financial skills to optimize projects and deliver the best solutions.

Dimitra Vallianatou

Dimitra Vallianatou

Civil Engineer

Dimitra is a Civil Engineer that during her postgraduate studies specialized in geotechnical engineering, but her passion for structures led her to obtain a master’s degree in Earthquake Engineering.

Within TRESIOS, she is seeking to make the best use of her strong technical and analytical background and contribute to the teamwork by challenging herself with a variety of both on- and off-shore projects.