Van Oord Dredging and Marine Contracters asked Wageningen Environmental Research for an assessment of their Supply Chain Sustainability Program, focused in particular on consistency with international environmental agendas and on possible, unforeseen effects. The Integral Conceptual Framework for a Circular Climate-Neutral Society has been used for the assessment. The assessment concludes that the program is adequate. It is well aligned with international agendas and will have a positive impact on air pollution, greenhouse gas emissions and plastic use. However, the issue of biodiversity receives too little attention in the program. It is therefore recommended in the short term to include biodiversity indicators in the monitoring of the program so that long-term actions can be linked to this.