Jan Mooibroek
Director & Geotechnical Specialist
With more than 16 years of offshore experience, Jan brings technical knowledge and leadership to construction, installation and site investigation projects. An accomplished operator of seabed, wireline, seismic and top-push CPT systems, he takes a practical, solution-focused approach.
Folkert Zuijderduijn
Geotechnical Specialist
Born into a family with deep roots in CPT, Folkert grew up around geotechnical testing and sampling. He has hands-on experience in CPT, vibrocoring, drilling, FAT/SAT testing, supervision and client representation on major offshore and nearshore projects. Also a social worker, he brings strong people skills and pride in continuing the family tradition.
Robert van Dijken
Geotechnical Specialist
Robert brings over 19 years of geotechnical experience in offshore CPT, sampling, drilling and equipment systems, including Geomil Manta, ORCA, Wison and AP van den Berg. Having worked as lead operator, foreman, offshore manager and instructor, he combines deep technical knowledge with strong leadership.
Robbin Lok
Geotechnical Specialist
Since 2019, Robbin has built extensive experience operating seabed CPT units and downhole equipment. Having completed external training in hydraulic system maintenance and PS logging, he has proven to be a great team member, both professionally and socially.
Rauten Hofsink
Geotechnical Specialist
With broad international offshore experience and a clear understanding of client expectations, Rauten brings a commercially focused approach to project delivery. He builds trusted relationships and represents client interests throughout complex geotechnical campaigns, linking clients, project teams and offshore operations.
Sabri Razak
Geotechnical Specialist
Sabri is a Senior CPT Operator with 17 years of offshore experience, specialising in downhole and seabed CPT systems such as AP van den Berg Wison/Roson and Geomil Orca/Manta. As Senior CPT Operator and Party Chief, he has supported major offshore wind and oil & gas projects worldwide, including CPT, vibrocoring and piston coring.
Jim Wongobe
Geotechnical Specialist
With a background in industrial engineering, Jim brings solid technical expertise to his role as a CPT Operator. Known for his honesty and strong work ethic, he consistently goes above and beyond expectations, making him a dependable and valued member of the team.
Ferry Endeveld
Geotechnical Specialist
With a strong military background, Ferry brings energy, discipline and a hands-on attitude to every project. His experience in leading teams, training personnel and maintaining high safety standards carries over naturally into offshore geotechnical work.
Joaquim Romero
Geotechnical Specialist
Joaquim is a geotechnical operator with offshore, nearshore and onshore experience, specialising in CPT, vibrocoring and subsea soil sampling. He works with systems including Neptune 5000, Manta-200, Panther-130, Rolatec CPTu and Geo-Vibro Corer, combining fieldwork with maintenance, troubleshooting and drilling support.
Sandeep Bandekar
Geotechnical Specialist
Sandeep is an experienced offshore geotechnical professional with a background in CPT, SCPT, vibrocoring, borehole drilling and data interpretation on offshore wind and oil & gas projects. He combines hands-on expertise with project coordination, QA/QC and offshore leadership.
Azlan Bin Awang
Geotechnical Specialist
With over 12 years in the industry and a diploma in mechanical engineering, Azlan brings knowledge and reliability to every project. Known for his strong work ethic and great sense of humour, he is a skilled technician and a team player who lifts morale and gets the job done right.
Arsad Bin Isa
Geotechnical Specialist
Arsad brings 19 years of offshore geotechnical experience in CPT operations, equipment maintenance and troubleshooting. With a diploma in electrical engineering and in-depth knowledge of AP van den Berg Wison/Roson and Geomil Orca/Manta systems, he has supported major offshore energy and wind projects worldwide.
Trusted Industry Relationships
Over the years, Subsoilutions has built strong working relationships with leading organisations in the geotechnical, offshore survey and marine construction industries.
Through these relationships, our specialists have supported projects involving advanced CPT systems, offshore site investigations and complex marine operations worldwide — a reflection of the trust placed in our practical expertise.
Who we are