About Us

We are CSL OWL SRI, an independent marine contractor specializing in subsea rock installation (SRI) services. Our mission is to deliver safe and cost-effective subsea rock installation solutions for the construction and maintenance of offshore wind parks. 

Based in Rotterdam, The Netherlands, our company is rooted in a rich maritime heritage and extensive Dutch marine contracting expertise. Our knowledge and experience are drawn from our shareholders: the Canadian-based The CSL Group (CSL) and the Dutch Offshore Wind Logistics (OWL).

The CSL Group is a world-class provider of complex marine solutions with a history that dates back to 1845. It is the world’s largest owner and operator of self-unloading vessels, the third-largest operator of cement carriers, and a leader in high-efficiency transhipment solutions.

OWL is renowned for its top-tier logistics solutions in the offshore wind sector, further enhanced by its industry-leading capabilities. The company was founded to enhance the efficiency of the offshore wind logistics supply chain, both operationally and financially.

Our team

Our team combines extensive experience and knowledge in subsea rock installation, shipping, and offshore industries.

Maurits van der Giessen

Chief Commercial Officer

Maurits has over 15 years of experience in the shipping industry. He has served as a Commercial Manager for SMIT Transport and Heavy Lift and was responsible for the commercial management of floating cranes at Bonn & Mees. Additionally, Maurits has experience as a project manager at Boskalis, overseeing multiple subsea rock installation projects.

Piet Jan van der Giessen

Chief Technical Officer

Piet Jan has more than 15 years of experience in fleet management, having served as Fleet Manager at Boskalis. His extensive background includes overseeing offshore vessels such as cable layers, dive support vessels, stone dumping vessels, and floating cranes, including the ‘Bokalift 1.’

Minne Meijer

Chief Financial Officer

Minne has over 25 years of experience as a CFO with various shipowners and ship management companies. Notably, as CFO of Hanzevast Shipping, he was instrumental in financing, building, and managing five ocean going tugs for Fairmount Marine (now part of Boskalis).

Maarten van der Giessen

Chief Executive Officer

Maarten brings over a decade of experience in the shipping industry, with a background that includes roles such as Commercial Manager for SMIT and Boskalis floating cranes. His expertise extends to major projects such as the Baltic 2 offshore wind farm jacket installation, the Izmit Bay Bridge construction in Turkey, and various FPSO integrations in Brazil.

Download our SRI vessel specifications

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